MUŇOZ-ANTOLI, C. et al. Study of Euparyphium albuferensis and Echinostoma friedi (Trematoda: Echinostomatidae) antagonistic interactions in the experimental definitive host. In Helminthologia. ISSN 0440-6605. Bratislava : Slovak Academic Press, 2004, vol. 41, no. 2, p. 81-84.