Rozanov MN, Koonin EV, Gorbalenya AE (August 1992). "Conservation of the putative methyltransferase domain: a hallmark of the 'Sindbis-like' supergroup of positive-strand RNA viruses". The Journal of General Virology. 73 (Pt 8): 2129–34. doi:10.1099/0022-1317-73-8-2129. PMID1645151.
Koonin EV, Dolja VV (1993). "Evolution and taxonomy of positive-strand RNA viruses: implications of comparative analysis of amino acid sequences". Critical Reviews in Biochemistry and Molecular Biology. 28 (5): 375–430. doi:10.3109/10409239309078440. PMID8269709.
Rozanov MN, Koonin EV, Gorbalenya AE (August 1992). "Conservation of the putative methyltransferase domain: a hallmark of the 'Sindbis-like' supergroup of positive-strand RNA viruses". The Journal of General Virology. 73 (Pt 8): 2129–34. doi:10.1099/0022-1317-73-8-2129. PMID1645151.
Koonin EV, Dolja VV (1993). "Evolution and taxonomy of positive-strand RNA viruses: implications of comparative analysis of amino acid sequences". Critical Reviews in Biochemistry and Molecular Biology. 28 (5): 375–430. doi:10.3109/10409239309078440. PMID8269709.