Majerus, V., Le Gal, F., De Roover, R., Donnay, I., Massip, A., & Dessy, F. (1999). Maturational competence is related to prepubertal calves oocyte diameter. Theriogenology, 51(1), 385. https://doi.org/10.1016/S0093-691X(99)91944-1 (Original work published 1999)