Isolation and expression of an altered mouse dihydrofolate reductase cDNA.
Proc Natl Acad Sci U S A. 1983 May;80(9):2495-9. doi: 10.1073/pnas.80.9.2495.
Proc Natl Acad Sci U S A. 1983.
PMID: 6573667
Free PMC article.