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3. Experimental Ascaris suum infection in piglets. Inverse relationship between the numbers of inoculated eggs and the numbers of worms established in the intestine;Andersen;Acta Pathol. Microbiol. Scand.,1973
4. Helmintheninfektionen von Wildschweinen bei Gatterhaltung in Suddeutschland: Artenspektrum und Befallshaufigkeit;Barutzki;Tierärztl. Prax.,1990
5. North Carolina swine parasite control program. North Carolina Agricultural Extension Service;Behlow;Extension folder,1974