Arnal Velasco, D. 2009. Ensayo clí­nico: Epidural con punción dural frente a epidural clásica en obstetricia: Cappiello, Eric MD; O’Rourke, Nollag FFARCSI; Segal, Scott MD; Tsen, Lawrence C. MD. A Randomized Trial of Dural Puncture Epidural Technique Compared with the Standard Epidural Technique for Labor Analgesia. Anesthesia & Analgesia: Volume 107(5), November 2008, pp 1646-1651. Revista Electrónica AnestesiaR. 1, 1 (ene. 2009), 2. DOI:https://doi.org/10.30445/rear.v1i1.20.