G. P. Alabaster, Coffey, M., y Wegelin-Schuringa, M. H. A.,
«Evaluation of novel pit-latrine exhauster with improved access for low-income settlements». UN-Habitat, United Nations Centre for Human Settlements, Nairobi, Kenya, p. 2 p. : 1 fig., 1 tab., 1996.
M. Jere, Dzotizei, A. T., y Munjoma, M.,
«Pit-latrine-emptying using motorized equipment», in
Sustainability of water and sanitation systems : proceedings of the 21st WEDC conference, Kampala, Uganda, 4-8 September 1995, 1996, pp. P. 140-142 : 1 tab.