Regulation of Teladorsagia circumcincta and Trichostrongylus colubriformis worm populations by grazing sheep with differing resistance statusLucas Gruner, Jacques Cortet, Christine Sauvé and Hervé HosteVet. Res., 35 1 (2004) 91-101DOI: https://doi.org/10.1051/vetres:2003043