The steppe species of gastrointestinal nematodes of small ruminants, with a focus on Marshallagia: climate as a key determinantS. Meradi, B. Bentounsi, I. Zouyed and J. CabaretParasite, 18 3 (2011) 261-269DOI: https://doi.org/10.1051/parasite/2011183261