1. Fisher, R.: The interaction between ethylene and other factors in controlling spore germination in the sensitive fern, Onoclea sensibilis L. Ph.D. Dissertation, 1974.

2. Fisher, R., and Miller, J.: Growth regulation by ethylene in fern gametophytes, IV. Involvement of photosynthesis in over-coming ethylene inhibition of spore germination. Amer. J. Bot. 62:1104-1111, 1975.

3. Filner, P., Fisher, R., Hirosawa, T., Zeevaart, J., and Delmer, D.: Plant Research '74. MSU/AEC Plant Research Laboratory, East Lansing, MI., 1975.

4. Hirosawa, T., Fisher, R., and Wolk, C.P.: Bioassay for algal products which inhibit heterocyst formation and stimulate sporulation. In: Plant Research 1974. DOE Plant Research laboratory, Michigan State University, 1975.

5. Fisher, R., and Wolk, P.: Substance stimulating the differentiation of spores of the blue-green alga Cylindrospermum licheniforme, Nature 259:394-395, 1976.

6. Fisher, R., Hirosawa, T., Shaffer, P.W., and Wolk, C.P.: A substance stimulating the differentiation of spores in the blue-green alga Cylindrospermum licheniforme In: Plant Research 1975. DOE Plant Research Laboratory. Michigan State University, 1976.

7. Cahill, S., Fisher, R., and Llewellyn, G.: Examination and evaluation of germination and protonemal development for Onoclea sensibilis fern spores treated with Aflatoxin B-1, Mycopathologia 64:43-47, 1978.

8. Fisher, R. and Miller, J.: Growth regulation by ethylene in fern gametophytes. V. Ethylene and the early events of spore germination. Amer. J. Bot. 65: 334-339, 1978.

9. Fisher, R. and Shropshire, W.: Reversal by light of ethylene induced inhibition of spore germination in the sensitive fern, Onoclea sensibilis - an action spectrum, Plant Physiol., 63: 984-988, 1979.

10. Gates, J., Fisher, R., and Candler, R.: the occurrence of coryneform bacteria in the leaf cavity of Azolla. Archives of Microbiol., 127:163-165, 1980.

11. Gates, J., Fisher, R., Goggin, T., and Azrolan, N.: Antigenic differences between Anabaena azollae fresh from the Azolla fern leaf cavity and free-living cyanobacteria, Archives of Microbiol., 128: 126-129, 1980.

12. Rosen, B.H., Johnson, R.C., Fisher, R.W., and Gates, J.E.: Ultrastructural localization of cell surface immunospecificity in Anabaena azollae using indirect fluorescent antibody staining. Amer. J. Bot. 74: 1060-1064, 1987.

13. Berliner, M.D., Neely-Fisher, D.L., Rosen, B.H., and Fisher, R.W.: Spheroplast induction in Anabaena variabilis and A. azollae. Protoplasma, 139: 36-40, 1987.

14. Redford, K., Berliner, M.D., Gates, J.E., Fisher, R.W., and Matthews, B.F.: Protoplast induction from sporophyte tissues of the heterosporous fern Azolla. Plant Cell, Tissue and Organ Culture, 10: 187-196, 1987.

15. Berliner, M., and Fisher, R.: Surface lectin binding to Anabaena variabilis and to cultured and freshly isolated Anabaena azollae. Current Microbiol. 16:149-152, 1987.

16. Reddy, P., and Fisher, R.: A novel method to produce Anabaena-free Azolla by in vitro fertilization of micromanipulated megasporocarps. Plant Cell Reports, 7:430-433, 1988.

17. Reddy, P., Conway, C., and Fisher, R.: Tunicamycin suppressess differentiation and stimulated dedifferentiation of heterocysts of the cyanobacterium Anabaena azollae Stras. Current Microbiol. 19:109-114, 1989.

18. Neely-Fisher, D., White, W., and Fisher, R.: Fructose-induced dark germination of Anabaena akinetes. Current Microbiol. 19:139-142, 1989.

19. Reddy, P.M., Conway, C.M., and Fisher, R.W.: Tunicamycin induced structural and developmental changes in the cyanobacterium Anabaena azollae Stras. Microbios Letters, 44:83-93, 1990.

20. Hardin, S.C. and Fisher, R.W.: Characterization of akinete differentiation in the cyanobacterium Anabaena azollae. Current Microbiol. 31:265-269, 1995.