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Elsevier‎(2003)‎

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By Willingham A.L.   Bogh H.O.   Vennervald B.J.   Johansen M.V.   Eriksen L.   Christensen N..   Nansen P.   in Veterinary Parasitology

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Elsevier‎(1996)‎

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By Friis H.   Andersen C. B.   Vennervald B. J.   Christensen N. O.   Pakkenberg B.   in Annals of Tropical Medicine and Parasitology

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Routledge Ltd‎(1998)‎

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