J. Rodrigáñez, C. Barragán, E. Alves, C. Gortázar, M. Toro, and L. Silió, “Genetic diversity and allelic richness in Spanish wild and domestic pig population estimated from microsatellite markers”, Span. j. agric. res., vol. 6, no. S1, pp. 107-115, Feb. 2008.