Prime-boost immunisation against tropical theileriosis with two parasite surface antigens: Evidence for protection and antigen synergy - Gharbi, M; Darghouth, M; Weir, W; Katzer, F; Boulter, N; Adamson, R; Gilbert, S; Jongejan, F; Westbroek, I; Hall, R; Tait, A; Shiels, B (2011)