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Schuppers, M.E.; Rosenberg, Gertrud; Graf, Ramona; Eidam, Verena; Wittwer, Christine; Zimmermann, Werner; Gottstein, Bruno; Frey, Caroline (2010). A study to demonstrate freedom of Trichinella spp. in domestic pigs in Switzerland. Zoonoses and public health, 57(7-8), pp. 130-135. Berlin: Wiley-Blackwell 10.1111/j.1863-2378.2009.01299.x
