Chattoo BB, et al. (1979) Patterns of Genetic and Phenotypic Suppression of lys2 Mutations in the Yeast SACCHAROMYCES CEREVISIAE. Genetics 93(1):67-79 PMID:17248970
Palmer E, et al. (1979) Variation of phenotypic suppression due to the psi+ and psi- extrachromosomal determinants in yeast. J Mol Biol 128(1):107-10 PMID:372547