[1]
R. . Rodríguez-Ramón, H. . Márquez-González, M. V. . Jiménez-Báez, and I. C. . Iparrea-Ramos, “Analgesic efficacy of two concentrations of bupivacaine in women in labor: Randomized, controlled, triple blind clinical trial”, Colomb. J. Anesthesiol., vol. 43, no. 3, pp. 179–185, Jul. 2015.