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(en) Stefan Diener, Swaib Semiyaga, Charles B. Niwagaba, Ashley Murray Muspratt, Jean Birane Gning, Mbaye Mbéguéré, Joseph Effah Ennin, Christian Zurbrugg et Linda Strande, « A value proposition: Resource recovery from faecal sludge—Can it be the driver for improved sanitation? », Resources, Conservation and Recycling, vol. 88, , p. 32–38 (DOI10.1016/j.resconrec.2014.04.005, lire en ligne)