Resistance to experimental infections with Haemonchus contortus in Romanov sheep G. Luffau, J. Wu Tien Khang, J. Bouix, TC Nguyen, P. Cullen, G. Ricordeau, C. Carrat and F. EychenneGenet. Sel. Evol., 22 2 (1990) 205-229DOI: https://doi.org/10.1051/gse:19900205