Source: https://www.researchgate.net/profile/Nicole_Sibelet/publication/235966261_Les_associations_agroforestieres_et_leurs_multiples_enjeux_-_The_multiple_challenges_of_agroforestry_associations/links/00463514e885476cb1000000/Les-associations-agroforestieres-et-leurs-multiples-enjeux-The-multiple-challenges-of-agroforestry-associations.pdf