Toky, Om Parkash, Pradeep  Kumar, and Prem Kumar  Khosla. 1989. ?Structure And Function Of Traditional Agroforestry Systems In The Western Himalaya. Ii. Nutrient Cycling?. Agroforestry Systems 9 (1): 71-89. doi:10.1007/BF00120156. https://doi.org/10.1007/BF00120156.