García Casco, J. M., M. Muñoz Muñoz, L. Silio López, and C. Rodríguez Valdovinos. “Genotype by Environment Interaction for Carcass Traits and Intramuscular Fat Content in Heavy Iberian Pigs Fattened in Two Different Free-Range Systems”. Spanish Journal of Agricultural Research, Vol. 12, no. 2, Apr. 2014, pp. 388-95, doi:10.5424/sjar/2014122-4840.