Armen Y. Mulkidjanian, Andrew Yu. Bychkov, Daria V. Dibrova, Michael Y. Galperin, Eugene V. Koonin
Proc Natl Acad Sci U S A. 2012 April 3; 109(14): E821–E830. Published online 2012 February 13. doi: 10.1073/pnas.1117774109
Includes additional comments & authors