1. Aperçu sur quelques effects de la pollution des eaux douces de la zone tempérée sur les biocénoses aquatiques;Carbiener;Bull. Sect. Géographie Paris,1969
2. Studies in the dynamics of plant populations. I. The fate of seed and transplants introduced into various habitats;Cavers;J. Ecol.,1967
3. Use of duckweeds for waste water treatment and animal feed;Culley;J. Water Pollut. Control Fed.,1973
4. Some factors in the competition or antagonism among bacteria, algae and aquatic weeds;Fitzgerald;J. Phycol.,1969
5. Experimentelle Untersuchungen über das Verhalten submerser Makrophyten bei NH4+-Belastung;Glänzer;Verh. Ges. Ökologie Saarbrücken,1973