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Gloor, M; Kaufmann, T; Peterhans, E; Zanoni, R; Steiner, A; Kirchhofer, M (2007). [Heifer breeding farms as a source for spreading the BVD virus?]. Schweizer Archiv für Tierheilkunde, 149(8), pp. 345-51. Bern: Huber 10.1024/0036-7281.149.8.345
Bodmer, M; Kaufmann, T; Zanoni, R; Steiner, A (2007). A BVD Free Communal Alpine Pasture in Switzerland. Cattle practice, 3(15), p. 294. Fretherne: British Cattle Veterinary Association