7Nkamleu B,Endamana D,Gockowski J,et al.Economic Analysis of Fuelwood Consumption in Forest Zones as exemplified in Cameroonianurban areas[].Secheresse.2002
8Shackleton C M,McConnachie M,Chauke M I,et al.Urban FuelwoodDemand and markets in a Small Town in South Africa:Livelihood Vulnerability and alien plant Control[].The International Journal of sustainable Development and World Ecology.2006