1. Arriaza, B., Allison, M., & Gerszten, E. (1988). Maternal mortality in pre-Columbian Indians of Arica, Chile. American Journal of Physical Anthropology, 77(1), 35–41. https://doi.org/10.1002/ajpa.1330770107
2. Bouwer, D.S. (2012). Ancient Egyptian health related to women: Obstetrics and gynaecology. Masters thesis. University of South Africa. Retrieved September 15, 2020, from http://uir.unisa.ac.za/bitstream/handle/10500/8786/dissertation_bouwer_ds.pdf?isAllowed=y&sequence=1
3. Cron, J. (2003). Lessons from the developing world: Obstructed labor and the vesico-vaginal fistula. Medscape General Medicine, 5(3), 24.
4. Derry, D. E. (1935). Note on five pelves of women of the Eleventh Dynasty in Egypt. BJOG: An International Journal of Obstetrics & Gynaecology, 42, 490–495. https://doi.org/10.1111/j.1471-0528.1935.tb12160.x
5. Dolea, C., & AbouZahr, C. (2003). Global burden of obstructed labor in the year 2000. World Health Organization. Retrieved September 18, 2020, from https://www.who.int/healthinfo/statistics/bod_obstructedlabour.pdf