SHUIFANG, X.., FENGYING, Z.., YUHUA, H.., XIYUN, L.., JINFANG, T.., YI, Q.. and FENGYING, X.., 2020. Evaluation of the comparative influence of magnesium sulfate single and combination with ritodrine hydrochloride in the prevention of preterm delivery . Bioscience Journal [online], vol. 36, no. 4, pp. 1491–1497. [Accessed28 June 2022]. DOI 10.14393/BJ-v36n4a2020-49897. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/49897.