Davies, Gritz; Davies, J (1983). "Plasmid-encoded hygromycin B resistance: the sequence of hygromycin B phosphotransferase gene and its expression in Escherichia coli and Saccharomyces cerevisiae". Gene. 25 (2–3): 179–88. doi:10.1016/0378-1119(83)90223-8. PMID6319235.
Davies, Gritz; Davies, J (1983). "Plasmid-encoded hygromycin B resistance: the sequence of hygromycin B phosphotransferase gene and its expression in Escherichia coli and Saccharomyces cerevisiae". Gene. 25 (2–3): 179–88. doi:10.1016/0378-1119(83)90223-8. PMID6319235.