Narenji, F., Delavar, M., & Rafiei, M. "Comparison the Effects of the Ginger Fresh Root and Vitamin B6 on the Nausea and Vomiting in Pregnancy", The Iranian Journal of Obstetrics, Gynecology and Infertility, 15, 2, 2012, 35–41. doi: 10.22038/ijogi.2012.5742