Saeed I, Maddox-Hyttel C, Monrad J, Kapel CM (June 2006). "Helminths of red foxes (Vulpes vulpes) in Denmark". Vet. Parasitol. 139 (1–3): 168–79. doi:10.1016/j.vetpar.2006.02.015. PMID16580775.
Davidson RK, Gjerde B, Vikøren T, Lillehaug A, Handeland K (March 2006). "Prevalence of Trichinella larvae and extra-intestinal nematodes in Norwegian red foxes (Vulpes vulpes)". Vet. Parasitol. 136 (3–4): 307–16. doi:10.1016/j.vetpar.2005.11.015. PMID16378689.
Saeed I, Maddox-Hyttel C, Monrad J, Kapel CM (June 2006). "Helminths of red foxes (Vulpes vulpes) in Denmark". Vet. Parasitol. 139 (1–3): 168–79. doi:10.1016/j.vetpar.2006.02.015. PMID16580775.
Davidson RK, Gjerde B, Vikøren T, Lillehaug A, Handeland K (March 2006). "Prevalence of Trichinella larvae and extra-intestinal nematodes in Norwegian red foxes (Vulpes vulpes)". Vet. Parasitol. 136 (3–4): 307–16. doi:10.1016/j.vetpar.2005.11.015. PMID16378689.