G. TÉLLEZ ISAIAS, E. ÁVILA GONZÁLEZ, E. SÁNCHEZ RAMÍREZ, E. POSADAS HERNÁNDEZ, and F. SALMERÓN SOSA, “Behaviour of certain productive characteristics, stress and resistance to Salmonella enteritidis in semi-heavy poultry under two production systems”, Vet Mex OA, vol. 36, no. 002, Oct. 2009.