Dass, A.P. et al. 2015. Implementing Standardised Rhodes Index to measure the Efficacy of ginger extract (Zingiber officinale) in pregnancy induced nausea and vomiting. International Journal of Pharmacological Research. 5, 10 (Oct. 2015), 222–225. DOI:https://doi.org/10.7439/ijpr.v5i10.2589.