Effectiveness and cost?benefit study to encourage herd owners in a cost sharing vaccination programme against bluetongue serotype?8 in Belgium, Cargnel, Mickael, Van der Stede Yves, Haegeman Andy, De Leeuw Ilse, De Clercq Kris, Méroc Estelle, and Welby Sarah , Transboundary and Emerging Diseases, Jan-01-2019, Volume 66, Issue 1, (2019)