1. Alekseev, A.Yu., Rozanova, E.I., Ustinova, E.N., et al., Antibodies to Morbilliviruses, Brucella and Toxoplasma in the Captive Bottlenose Dolphin Tursiops truncatus ponticus from the Black Sea, Biol. Morya, 2007, vol. 33, no. 6, pp. 465–468.
2. Usovich, A.T. and Lebedev, P.T., Primenenie matematicheskoi statistiki pri obrabotke eksperimental’ nykh dannykh v veterenarii (Application of Mathematical Statistics to Experimental Data Treatment in Veterinary), Omsk: Zapadnosibirskoe Knizhn. Izd. (West Siberian Book Publishers). 1970.
3. Bandoli, J.G. and de Oliveira, C.A.B., Toxoplasmose em Sotalia guianensis (Van Beneden, 1863) Cetacea-Delphinidae, Folha Méd., 1977, vol. 75, pp. 459–468.
4. Cabezon O., Resendes A.R., Domingo M. et al. Seroprevalence of Toxoplasma gondii Antibodies in Wild Dolphins from the Spanish Mediterranean Coast, J. Parasitol., 2004, vol. 90, pp. 643–644.
5. Daszak, P., Cunningham, A.A., and Hyatt, A.D., Anthropogenic Environmental Change and the Emergence of Infectious Diseases in Wildlife, Acta Trop., 2001, vol. 78, no. 2, pp. 103–116.