Johnson, P. W.; Donaghay, P. L.; Small, E. B.; Sieburth, J. M. (1995). Ultrastructure and Ecology of Perispira ovum (Ciliophora: Litostomatea): An Aerobic, Planktonic Ciliate that Sequesters the Chloroplasts, Mitochondria, and Paramylon of Euglena proxima in a Micro-oxic Habitat. The Journal of Eukaryotic Microbiology. 42(3): 323-335.
Johnson, P. W.; Donaghay, P. L.; Small, E. B.; Sieburth, J. M.
1995
Ultrastructure and Ecology of Perispira ovum (Ciliophora: Litostomatea): An Aerobic, Planktonic Ciliate that Sequesters the Chloroplasts, Mitochondria, and Paramylon of Euglena proxima in a Micro-oxic Habitat