1. Austin, S., Baer, M. A., and Helgeson, J. P. (1985). Transfer of resistance to potato leaf roll virus from Solarium brevidens into Solarium tuberosum by somatic fusion. Plant Sci. 39: 75–82.
2. Austin, S., Ehlenfeldt, M. K., Baer, M. A., and Helgeson, J. P. (1986). Somatic hybrids produced by protoplast fusion between S. tuberosum and S. brevidens: Phenotypic variation under field conditions. Theor. Appl. Genet. 71: 628–690.
3. Barsby, T. L., Shepard, J. R, Kemple, R. J., and Wong, R. (1984). Somatic hybridization in the genus Solanum: S. tuberosum and S. brevidens. Plant Cell Rep. 3: 165–167.
4. Bates, G. W. (1990). Transfer of tobacco mosaic virus resistance by asymmetric protoplast fusion. Pages 293–298. In Proc. VII Inter. Congress on Plant Tissue and Cell Culture, Amsterdam, The Netherlands, 24–29 June. Progress in Plant Cellular and Molecular Biology. Nijkamp, H. J. J., Van Der Plas, L. H. W., and Van Aartrijk, J., eds., Kluwer Academic Publishers, Dordrecht, The Netherlands.
5. Bates, G. W., Hasenkampf, C. A., Contolini, C. L., and Piastuch, W. C. (1987). Asymmetric hybridization in Nicotiana by fusion of irradiated protoplasts. Theor. Appl. Genet. 74: 718–726.