1. Asina, S. and Hubbes, M. 1980. Compatibility in Ceratocystis ulmi. Eur. J. For. Pathol. 10:20–1208.
2. UCLA Symposia on Molecular and Cellular Biology New Series 122;MR Bates,1991
3. Bernier, L. 1983. Relationships between isoenzymes, cultural characters, and pathogenicity in Ceratocystis ulmi (Buism.) C. Moreau. M.Sc.F. Thesis, University of Toronto, Toronto.
4. Bernier, L. 1988. Induction, characterization and mapping of mutations in Ophiostoma ulmi, the causal agent of Dutch elm disease. Ph.D. Thesis, University of Toronto, Toronto.
5. Bernier, L. and Hubbes, M. 1990a. Mutations in Ophiostoma ulmi induced by N-methyl-N’-nitro-N-nitrosoguanidine. Can. J. Bot. 68:225–231.