Allman, M., Ferenčík, M., Jankovský, M., Stanovský, M., & Messingerová, V. (2015). Damage caused by wheeled skidders on cambisols of central Europe. Croatian Journal of Forest Engineering, 36(2): p. 205-215.
Anon (2011). The method of measuring gaseous pollutants and released exhaust particles. Guideline No 6764. National Standards and Industrial Research Organization of Iran. Tehran, Iran. (in Persian)
Anon. (1992). Cost Control in Forest Harvesting and Road Construction. Forestry Paper No. 99. Rome, Food and Agriculture Organization of the United Nations, 106p.
Anon. (1998). USDA Forest Service Manual, FSM 2520 (Watershed Protection and Management) R-6. Suplement No. 2500-98-1.
Anon. (2006). European Ergonomic and Safety Guidelines for Forest Machines. Europian Commission.100 p.
Anon. (2007). Forest Management Plan Seri 1 Section 6 Nekachoob. Sari, Iran. (in Persian)
Behroozi-Lar, M., Payandeh, J., & Bagheri-Khodarahmpour, Z. (2012). Comparison of noise level of tractors with cab and without in different gears on driver ear and bystander. African Journal of Agricultural Research, 7(7): p. 1150-1155.
Beuk, D., Tomasic, Z., & Horvat, D. (2007). Status and development of forest harvesting mechanization in Croatian state forestry. CroationJournalof ForestEngineering.28(1): p. 63-82.
Cantú, L., & Lebel, L. (2010). How adequate are equipment replacement models for logging contractors? Proceedings of the 33rd Annual Meeting of the Council on Forest Engineering (COFE). June 6-9, Auburn AL, USA.
Conrad, J. L., Vokoun, M. M., Prisley, S. P., & Bolding, M. C. (2017). Barriers to logging production and efficiency in Wisconsin [Internet]. International Journal of Forest Engineering. 28, p. 57-65.
Eghtesadi. (2008). Evaluation of wood productivity rate in primary and secondary transportation in Nekachub region. Iranian JournalofForest and Poplar Research,16(2): p. 274-291. (in Persian)
Epron, D., Plain, C., Ndiaye, F., Bonnaud, P., Pasquier, C., & Ranger, J. (2016). Effects of compaction by heavy machine traffic on soil fluxes of methane and carbon dioxide in a temperate broadleaved forest. Forest Ecology and Management, 382, p. 1-9.
Frey, B., Kremer, J., Rüdt, A., Sciacca, S., Matthies, D., & Lüscher, P. (2009). Compaction of forest soils with heavy logging machinery affects soil bacterial community structure. European Journal of Soil Biology, 45(4): p. 312-320.
Häggström, C., Kawasaki, A., & Lidestav, G. (2013). Profiles of forestry contractors and development of the forestry-contracting sector in Sweden. Scandinavian Journal of Forest Research, 28(4): p. 395-404.
Holzleitner, F., Stampfer, K., & Visser, R. (2011). Utilization rates and cost factors in timber harvesting based on long-term machine data. Croat Journal of Forest Engineering, 32, p. 501-508.
Hosseini, S. A. O., Nasiri, M., & Akbarimehr, M. (2014). Skidders traffic assessment on forest soil properties. International Journal of Civil Engineering, 3(3): p. 372-377.
Jourgholami, M., & Majnounian, B. (2014). Productivity of timber extraction using farm tractor equiped with trailer (Case study: in Kheiroud Forest in northern Iran). Iranian Journal of Forest and Poplar Research. 22(2):b p. 332-346. (in Persian)
Lotfalian, M. (2011). Wood Transportation. Aeeizh Press, Tehran, Iran. (in Persian)
Lotfalian, M. (2015). Logging. Aeeizh Press, Tehran, Iran. (in Persian)
Magagnotti, N., & Spinelli, R. (2011). Financial and energy cost of low-impact wood extraction in environmentally sensitive areas. Ecological Engineering, 37(4): p. 601-606.
Marčeta, D., Petković, V., & Košir, B. (2014). Comparison of two skidding methods in beech forests in mountainous conditions. Nova Mehanizacija Sumarstva, 35(14): p. 51-62.
Mohammadi-Limaei, S., Seddigh-Kouhi, M., & Rostami-Sharaji, T. (2014). Goal programming aproach for sustainable forest management (case study in Iranian Caspian forests). Journal of Forestry Research, 25(2): p. 429-435.
Mousavi, R., Nikooy, M., & Naghdi, R. (2013). Comparison of timber skidding using two ground-based skidding systems: graple skidding vs. cable skidding. International Journal of Forest, Soil and Erosion. 3(3): p. 79-86.
Naghdi, R., & Mohammadi Limaei, S. (2009). Optimal Forest Road Density Based on Skidding and Road Construction Costs in Iranian Caspian Forests. Caspian Journal of Enviromental Science, 7(2): p. 79-86.
Naghdi, R., & Mousavi, S. R. (2016). Impacts of rubber-tired skidder and crawler tractor on forest soil in the mountainous forests of northern Iran. Baltic Forestry, 22(2): p. 375-381.
Naghdi, R., Bagheri, I., Akef, M., & Mahdavi, A. (2007). Soil compaction caused by 450C Timber Jack wheeled skidder (Shefarood forest, northern Iran). Journal of Forest Science, 53(7): p. 314-319.
Naghdi, R., Firouzan, A. H., Nikooy, M., & Barari, K. (2010). Evaluation of production and cost of hsm-904 skidder and timber jack c-405 in forests of wood and paper industries of Mazandaran. Journal of Forest and Wood Products (JFWP), Iranian Journal of Natural Resources. 63(1): p. 91-102. (in Persian)
Raghavan, G., Mackeys, E., & Beaulleu, B. (1977). Prediction of clay soil compaction. Journal of Terramechanics, 14(1): p. 31-38.
Schenewerk, W. (2006). Automatic DRAC LMFBR to speed licensing and mitigate co2. WSEAS Transactions on Environment and Development, 7(2): p. 404.1-404.8
Shi, B., Ekberg, L., & Langer, S. (2013). Intermediate air filters for general ventilation applications: An experimental evaluation of various filtration efficiency expressions. Aerosol Science and Technology, 47, p. 488-498.
Siddharth, S. (2006). Green energy-anaerobic digestion. converting waste to electricity. WSEAS Transactions on Environment and Development, 7(2): p. 276-280.
Sidhu, S., Graham, J., & Striebich, R. (2001). Semi-volatile and particulate emissions from the combustion of alternative diesel fuels. Chemosphere, 42(5-7): p. 681-90.
Spinelli, R., Lombardini, C., & Magagnotti, N. (2013). Salvaging windthrown trees with animal and machine systems in protected areas. Ecological Engineering, 53, p. 61-67.
Spinelli, R., Magagnotti, N., Pari, L., & De Francesco, F. (2015). A comparison of tractor-trailer units and high-speed forwarders used in Alpine forestry. Scandinavian Journal of Forest Research, 30, p. 470-477.
Spinelli, R., Owende, P. M. O., Ward, S. M., & Tornero, M. (2004). Comparison of short-wood forwarding systems used in Iberia. Silva Fennica, 38(1): p. 85-94.
Šporčić, M., Landekić, M., Lovrić, M., Bogdan, S., & Šegotić, K. (2010). Multiple criteria decision making in forestry. Methods and Experiences, 134(5): p. 275-286.
Tavankar, F., Mjnonian, B., & Eslam-Bonyad, A. (2009). Logging damages on forest regeneration and soil compaction using ground-based system (case study: asalem forest aarea, Guilan). Journal of Water and Soil Science. 13(48): p. 449-456. (in Persian)
Vusić, D., Šušnjar, M., Marchi, E., Spina, R., Zečić, Z., & Picchio, R. (2013). Skidding operations in thinning and shelterwood cut of mixed stands-Work productivity, energy inputs and emissions. Ecological Engineering, 61(A): p. 216-223.
Zavrl, D. (2008). Investment Decision Making. Ekonomska IstraVzivanja, 21(3): p. 25-42.