M Calvo, F Gilsanz, F Palacio, I Fornet… - Revista de la Sociedad …, 2005 - SciELO Espana
CALVO, M. et al. Observational study of epidural analgesia used in labour: Complications of
this technique in 5,895 pregnant women. Rev. Soc. Esp. Dolor [online]. 2005, vol. 12, n. 3 …