Anonymous (2006) Nav district forestry plan. Technical group of Tak Sabz, Shafaroud Company, Sabz publication: 379.
Appanah, S. and Weinland, G. (1990) Will the management systems for hill dipterocarp forests stand up? Journal of Tropical Forest Science, 3:140-158.
Barreto, P., Amaral, P., Vidal, E., Uhl, C. (1998) Costs and benefits of forest Management for timber production in eastern Amazonia. Forest Ecology and Management, 180: 9-26.
Bruenig, E. F. (1996) Conservation and management of tropical rain forests. An integrated approach to sustainability. CAB International, Oxford, UK 339.
Cedergren, J., Falck, J., Garcia, A., Goh, F., Hagner, M. (2002): Feasibility and usefulness of directional felling in a tropical rain forest. Journal of Tropical Forest Science, 14:179-190.
Conway, S. (1976) Logging practices. Principles of timber harvesting systems. Miller Freeman Publications. Inc USA. 412.
Dent, D. D. (1974) Professional timber falling: A procedural approach. Ryder printing Co, Portland, OR, 181.Ershadifar, M., Nikooy, M., Naghdi, R. (2011) Ability assessment of felling crew in directional felling in west forest of Guilan province. Iranian Journal of Forest, 3: 169-176. (in Persian).
Gerwig, J.J., Johns, J.S., Vidal, E. (1996) Reducing waste during logging and log processing: forest conservation in eastern Amazonia. Unasylva, 187: 17-25.ITTO (1996) Felling the right way. Some hints on the art and science of directional felling. Tropical Forest Update, 6: 5–7.
Johns, J. S., Barreto, P., Uhl, C. (1996): Logging damage during planned and unplanned logging operations in the eastern Amazon. Forest Ecology and Management, 89: 59-77.
Jonsson, T., Lindgren, P. (1990) Logging technology for tropical forests: for or against. Forest Operations Institute, Kista, Sweden. 81 pp.
Koger, J.L. (1983) Observed methods for felling hardwood trees with chain saws. Res. Note SO-297. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 7 p.
Krueger, W. (2004) Effects of future crop tree flagging and skid trail planning on conventional diameter-limit logging in a Bolivian tropical forest. Forest Ecology and Management, 188: 381–393.
Majnounian, B., Jourgholami, M., Zobeiri, M., Feghhi, J. (2008) Assessment of forest harvesting damage to residual stands and regenerations - a case study of Namkhaneh District in Kheiroud forest. Environmental Sciences, 7:33-44. (in Persian) Marvi-
Mohajer, M.R. (2006) Silviculture. University of Tehran, Iran, 387.Mattson-Marn, H., Jonkers, W. (1981) Logging damage in tropical high forest. UNDP/FAO forestry development project Sarawak. Forestry Department, Kuching, 15.
Naghdi, R. (2004) Study of optimum road density in tree length and cut to length systems, PhD thesis, Faculty of Natural Resources, University of Tarbiat Modarres, 177.
Nikooy, M. (2007) Optimizing production cost and damage reduction to wood, Nikooy et al.,183trees and forest by harvest planning (case study: Asalem forest district area). PhD thesis, Natural Resources Faculty, Tehran University, 186. ( in Persian).
Nikooy, M., Rashidi, R., Kocheki, G. (2010) Residual trees injury assessment after selective cutting in broadleaf forest in Shafaroud, Caspian Journal of. Environmental Science, 8, 173-179.
Ong, R., Kleine, M. (1995) A dipterocarp forest growth simulation model for Sabah. Forest Research Centre Research Papers, No. 2. Forestry Department, Sabah, Malaysia, 94.
Pinard, M.A. (1994) The reduced-impact logging project. A pilot carbon offset project in Sabah, Malaysia. ITTO Tropical Forest Update, 4: 11-12.
Pinard, M.A., Putz, F.E., Tay, J., Sullivan, T.E. (1995) Creating timber harvest guidelines for a reduced-impact logging project in Malaysia. Journal of Forestry, 93: 41-45.
Shormage, Y. (2009) Economical and environmental analysis of felling during conventional and planned harvesting: case study. Nav district, Guilan province. MSc Thesis, Natural Resources Faculty, Guilan University, 91. (in Persian).
Simmons, F.C. (1979) Handbook for Eastern Timber Harvesting U.S. Department of Agriculture, Forest Service, Northeastern Area, State and Private Forestry Broomall, PA. l8O.
Vanclay, J.K. (1993) Environmentally sound timber harvesting. In restoration of tropical forest ecosystems. Lieth, H. & Lohmann M. (Eds), Kluwer Academic Publishers, the Netherlands, 185-192