Naila O. Alieva, Karen A. Konzen, Steven F. Field, Ella A. Meleshkevitch, Marguerite E. Hunt, Victor Beltran-Ramirez, David J. Miller, Jörg Wiedenmann, Anya Salih, Mikhail V. Matz
PLoS One. 2008; 3(7): e2680. Published online 2008 Jul 16. doi: 10.1371/journal.pone.0002680