1. Botija, C.S., 1963. Reservorios del virus de la peste porcina africana. Investigacion del virus de la P.P.A. en los artropodos mediante la prueba de la hemoadsorcion. Bull. Off. Int. Epiz., 60: 895?899.
2. Butler, J.F. and Gibbs, E.P.J., 1982. Sampling techniques for burrow-dwelling ticks and other arthropods. FAO/ASF Newsletter No. 20, pp. 11?14.
3. Butler, J.F. and Gibbs, E.P.J., 1984. Distribution of potential soft tick vectors of African swine fever in the Caribbean region (Acari: Argasidae). Prev. Vet. Med., 2(1?4): 63?70.
4. Butler, J.F., Hess, W.R., Endris, R.G. and Holscher, K.H., 1984a. In vitro feeding ofOrnithodoros ticks for rearing and assessment of disease transmission. Acarology, VI Vol. 2.
5. Butler, J.F., Holscher, K.H. and Adeyeye, O., 1984b. Sampling techniques for burrow-dwelling ticks in reference to potential African swine fever virus vectors. Acarology, VI, Vol. 2.