1. Adams, P.W. 1990. Soil compaction in woodland properties. Series: The Woodland Workbook. Forest Protection. EC 1109. Corvallis, OR: Oregon State University Extension Service. 8 p.
2. Adams, P.W.; Froehlich, H.A. 1984. Compaction of forest soils. A Pacific Northwest Extension Publication. PNW-217. 13 p.
3. Addison, J.A.; Barber, K.N. 1997. Response of soil invertebrates to clearcutting and partial cutting in a boreal mixedwood forest in northern Ontario. Information Report GLC-X-1. Sault Ste. Marie, ON: Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre. 23 p.
4. Agherkakli, B.; Najafi, A.; Sadeghi, S.H. 2010. Ground based operation effects on soil disturbance by steel tracked skidder in a steep slope of forest. Journal of Forest Science. 56(6): 278–284. doi: 10.17221/93/2009-JFS.
5. Akay, A.E.; Yuksel, A.; Reis, M.; Tutus, A. 2007. The impacts of ground-based logging equipment on forest soil. Polish Journal of Environmental Studies. 16(3): 371–376.