1. BOTELLA J. Endocrinología de la mujer 4ª ed. Científico Médica. Barcelona 1966.
2. Diccionario Terminológico de Ciencias Médicas. 2nd. ed. Oxford Blackwell Scientific Publications, 1962.
3. DICKINSON R. L. Human Sex Anatomy 2nd. ed. Williams and Wilkins co. ED. Baltimore 1949.
4. FAIMAN C. and WINTER J. S. D. Gonadotropins and sex hormone patterns in puberty: clinical data. Grunbach M. M. Grave G. D. and Mayer, F. E. (eds): Control of the Onset of Puberty. New York, John Wiley and Sons, Inc. 1974.
5. FALKNER F. Some Physical grow standards for white North American children. Pediatrics, 29: 467, 1962.