1. Standard methods for the examination of water and waste water,1975
2. Gewinnung von Biogas aus organischens Rückständen;Baader;Der Champignon,1981
3. Biogas from coffee pulp;Calzada;Biotechnology Letters,1981
4. Predicting methane fermentation biodegrability;Chandler,1980
5. Rumen ciliate protozoa;Coleman;Advances in Parasitology,1980