1. Excretion of organic compounds by Chlamydomonas;Allen;Arch. Mikrobiol.,1956
2. Biotin liberation by the alga Coccomyxa sp. and by Chlorella pyrenoidosa;Bednar;Plant Cell Physiol.,1964
3. Ueber das Zusammenleben von Thieren und Algen;Brandt;S.B. Ges. Naturf. Fr. Berl.,1881
4. Etude d'Hydra viridis (Linnaeus) (la blastogénèse, la spermatogénèse, l'ovogénèse);Brien;Ann. Roy. Soc. Zool. Belg.,1950
5. Substrate assimilation and heterotrophy;Danforth,1962