1. Síndrome de Horner como complicación de la anestesia epidural;Torres;Rev Esp Anestesiol Reanim,1982
2. Diagnóstico diferencial del síndrome de Horner en analgesia epidural obstétrica. ¿Cuándo preocuparse?;Vidal;Rev Esp Anestesiol Reanim,2005
3. Phisiologic changes of pregnancy;Conklin,1999
4. Pupillary constriction and ptosis following causal epidural analgesia;Mohan;Anaesthesia,1975
5. The incidence of Horner’s Syndrome during lumbar extra-dural for elective caesarean section and provision of analgesia during labour;Clayton;Anaesthesia,1983