Strain specific differences in ribosomal DNA from the ectomycorrhizal fungi Laccaria bicolor (Maire) Orton and Laccaria laccata (Scop ex Fr) Br F Martin, M Zaiou, F Le Tacon and P RygiewiczAnn. For. Sci., 48 3 (1991) 297-305DOI: https://doi.org/10.1051/forest:19910305