The following publications are possibly variants of this publication:
- Human Immunodeficiency Virus Reverse Transcriptase and Protease Sequence DatabaseRobert W. Shafer, Derek Stevenson, Bryan Chan. nar, 27(1):348-352, 1999.
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- Human Immunodeficiency Virus Reverse Transcriptase and Protease Sequence Database: an expanded data model integrating natural language text and sequence analysis programsRami Kantor, Rhoderick Machekano, Matthew J. Gonzales, Kathryn Dupnik, Jonathan M. Schapiro, Robert W. Shafer. nar, 29(1):296-299, 2001.
- HIV-1 Subtype B Protease and Reverse Transcriptase Amino Acid CovariationSoo-Yon Rhee, Tommy F. Liu, Susan P. Holmes, Robert W. Shafer. ploscb, 3(5), 2007. [doi]