Pre-registration efficacy study of a novel marker vaccine against classical swine fever on maternally derived antibody positive (MDA+) target animals., Farsang, A, Levai R, Barna T, Fábián K, Blome S, Belák K, Bálint Á, Koenen F., and Kulcsar G , Biologicals, 2017 Jan, Volume 45, p.85-92, (2017)