1. DUSI, H, Power of synthesis of some euglena;autotrophic euglena and heterotrophic euglena., COMPTES RENDUS DES SEANCES DE LA SOCIETE DE BIOLOGIE ET DE SES FILIALES 105: 837 (1930).
2. FINKLE, B.J., GROWTH OF CHLORELLA-VULGARIS IN THE DARK, SCIENCE 111: 309 (1950).
3. FRENKEL, A. W., BIOLOGICAL BULLETIN 97: 261 (1949).
4. GERLOFF, J, ARCHIV FUR PROTISTENKUNDE 94: 311 (1940).
5. IGGENA, M.L., ARCH MIKROBIOL 9: 129 (1938).