Clottey V A, Agyare W A, Gyasi K O, Schreurs M, Maatman A, Abdulai H and Dinku R K 2006: Composting to ensure food security: Learning by doing. Livestock Research for Rural Development. Volume 18, Article #137. Retrieved
, from http://www.lrrd.org/lrrd18/10/clot18137.htm