1. Bischoff, H. W., Bold, H. C. 1963. Phycological studies IV. University of Texas Publications No. 6318.
2. Buchanan, R. E., Gibbons, N. E. (eds.). 1974., Bergey's manual of determinative bacteriology, 8th ed. Baltimore: Williams & Wilkins.
3. Chan, E., Pelczar, M. Jr. (eds.) 1972. Laboratory exercises in microbiology. New York: McGraw-Hill.
4. Cooper, G., Margulis, L. 1978. Delay in migration of symbiotic algae inHydra viridis by inhibitors of microtubule protein polymerization. Cytobios19:7–19.
5. Fracek, S., Margulis, L. 1979. Colchicine, nocodazole and trifluralin: Different effects of microtubule inhibitors on the uptake and migration of endosymbiotic algae inHydra viridis. Cytobios23, in press.