Castro, A. M. M. G. de (2018) “Intermittent elimination of Porcine Parvovirus 4 (PPV4) in naturally infected swine semen: first report”, Semina: Ciências Agrárias, 39(5), pp. 2281–2286. doi: 10.5433/1679-0359.2018v39n5p2281.