Efficiency and demographics of a high-yield dairy ewe farm with two managing systems involving five or 10 lambings per year oleh J.-L. Pesantez-Pacheco, L. Torres-Rovira, F. Hernandez, M.V. Sanz-Fernandez, N.P. Villalobos, A. Heras-Molina, C. Garcia-Contreras, M. Vazquez-Gomez, P. Martinez-Ros, J.-V. Gonzalez-Martin, A. Gonzalez-Bulnes, S. Astiz