Ivanov V I, Kamakim A M, Ushivtzev V B, Shiganova T, Zhukova O, Aladin N, Wilson S I, Harbison G R, Dumont H J, 2000. Invasion of Caspian Sea by the comb jellyfish M. leidyi (Ctenophora). Jour. Biological Invasions. 255-258.