Digital reviews in molecular biology: approaches to structured digital publication. - David L. Steffen; Alan E. Levine; S. Yarus; R. A. Baasiri; D. A. Wheeler (Bioinform., 2000)

OrCGDB: a database of genes involved in oral cancer. - Alan E. Levine; David L. Steffen (Nucleic Acids Res., 2001)