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Brown DA, Berg HC.Brown DA, et al. Among authors: berg hc.Proc Natl Acad Sci U S A. 1974 Apr;71(4):1388-92. doi: 10.1073/pnas.71.4.1388.Proc Natl Acad Sci U S A. 1974.PMID: 4598304Free PMC article.
Segall JE, Manson MD, Berg HC.Segall JE, et al. Among authors: berg hc.Nature. 1982 Apr 29;296(5860):855-7. doi: 10.1038/296855a0.Nature. 1982.PMID: 7040985No abstract available.