Lystad, H.

Warner, W., Haarstad, K. & Lystad, H., 1999. Evaluating ecological sanitation systems (EvaSan) for handling human waste Draft., As, Norway: Jordforsk, Norwegian Center for Soil and Environmental Research. Available at: https://es.ircwash.org/sites/default/files/Haarstad-1999-Evaluating.pdf.