Lindberg, Clas (1996) Society and Environment Eroded, A Study of Household Poverty and Natural Resource Use in Two Tanzanian Villages. Uppsala, Department of Social and Economic Geography (Coll. « Geografiska Regionstudier »), 29, 164 p. (ISBN 91-506-1156-9) - Simard, Paule (Cahiers de géographie du Québec, 1997)