W. S. ABELI; G.M . MAGOMU. OPTIMAL ROAD SPACING FOR MANUAL SKIDDING SULKIES. Journal of Tropical Forest Science (JTFS) , [S. l.], v. 6, n. 1, p. 8–15, 1993. Disponível em: https://jtfs.frim.gov.my/jtfs/article/view/1863. Acesso em: 17 may. 2024.