Maglennon, G A, Cook, B S, Matthews, D, Deeney, A S, Bossé, J T, Langford, P R, Maskell, D J, Tucker, A W, Wren, B W, Rycroft, A N, "Development of a self-replicating plasmid system for Mycoplasma hyopneumoniae", VETERINARY RESEARCH,