Dubey, J.P., Zarnke, R., Thomas, N.J., Wong, S.K., Van, Bonn, W., Briggs, M., Davis, J.W., Ewing, R., Mense, M., Kwok, O.C., Romand, S., Thulliez, P. (2003)Toxoplasma gondii, Neospora caninum, Sarcocystis neurona, and Sarcocystis canis-like infections in marine mammals, Vet Parasitol. , 116(4), pp. 275-96.