Ufearo, C., C. Nwokocha, C. Ikuenobe, J. Egwurugwu, and A. O. Oluboyo. “Prolactin Secretory Response During Academic Exercises in Young Adult Male Subjects”. Journal of Biomedical Investigation, vol. 5, no. 2, Dec. 2007, pp. 63-65, https://journals.unizik.edu.ng/jbi/article/view/2617.