The COG database: new developments in phylogenetic classification of proteins from complete genomes. - Roman L. Tatusov; Darren A. Natale; Igor V. Garkavtsev; Tatiana A. Tatusova; Uma T. Shankavaram; Bachoti S. Rao; Boris Kiryutin; Michael Y. Galperin; Natalie D. Fedorova; Eugene V. Koonin (Nucleic Acids Res., 2001)

The COG database: an updated version includes eukaryotes. - Roman L. Tatusov; Natalie D. Fedorova; John D. Jackson; Aviva R. Jacobs; Boris Kiryutin; Eugene V. Koonin; Dmitri M. Krylov; Raja Mazumder; Sergei L. Mekhedov; Anastasia N. Nikolskaya; B. Sridhar Rao; Sergei Smirnov; et al. (BMC Bioinform., 2003)

FLAN: a web server for influenza virus genome annotation. - Yiming Bao; Pavel Bolotov; Dmitry Dernovoy; Boris Kiryutin; Tatiana A. Tatusova (Nucleic Acids Res., 2007)

The National Center for Biotechnology Information's Protein Clusters Database. - William Klimke; Richa Agarwala; Azat Badretdin; Slava Chetvernin; Stacy Ciufo; Boris Fedorov; Boris Kiryutin; Kathleen O'Neill; Wolfgang Resch; Sergei Resenchuk; Susan Schafer; Igor Tolstoy; et al. (Nucleic Acids Res., 2009)

Virus Variation Resource - recent updates and future directions. - J. Rodney Brister; Yiming Bao; Sergey A. Zhdanov; Yuri Ostapchuck; Vyacheslav Chetvernin; Boris Kiryutin; Leonid Zaslavsky; Michael Kimelman; Tatiana A. Tatusova (Nucleic Acids Res., 2014)