ALIREZA KAMALI, MARYAM SHOKRPOUR, ESMAT MASHHADI, and MARYAM HOSSEINZADE MORAHEM. 2022. “COMPARISON OF LABOR PHASES IN PAINLESS DELIVERY WITH EPIDURAL ANALGESIA AND ENTONOX ADMINISTRATION: Pharmaceutical Science-Medicine”. International Journal of Life Science and Pharma Research 7 (2):1-4. https://ijlpr.com/index.php/journal/article/view/1101.