2Fedak M A, Wilson B, Pomeroy P P. Reproductive Behavior [A].In : Perrin W F, Wursig B , Thewwissen J G M eds.Encyclopedia of Marine Mammals[C].San Diego:Academic Press,2002.1015-1026.
3Tyack P L.Behavior,Overview [A].In: Perrin W F, Wursig B, Thewwissen J G M eds.Encyclopedia of Marine Mammals[C].San Diego:Academic Press,2002.87-93.