Fleischmann, W. Robert (1996), Baron, Samuel (ed.), "Viral Genetics", Medical Microbiology (4th ed.), Galveston (TX): University of Texas Medical Branch at Galveston, ISBN978-0-9631172-1-2, PMID21413337, retrieved 2022-07-06
Fleischmann, W. Robert (1996), Baron, Samuel (ed.), "Viral Genetics", Medical Microbiology (4th ed.), Galveston (TX): University of Texas Medical Branch at Galveston, ISBN978-0-9631172-1-2, PMID21413337, retrieved 2022-07-06