Modalen AO, Westman L, Arlander E, Eriksson LI, Lindahl SG (February 2003). "Hypercarbic and hypoxic ventilatory responses after intrathecal administration of bupivacaine and sameridine". Anesthesia and Analgesia. 96 (2): 570–5, table of contents. doi:10.1097/00000539-200302000-00049. PMID12538214.
Modalen AO, Westman L, Arlander E, Eriksson LI, Lindahl SG (February 2003). "Hypercarbic and hypoxic ventilatory responses after intrathecal administration of bupivacaine and sameridine". Anesthesia and Analgesia. 96 (2): 570–5, table of contents. doi:10.1097/00000539-200302000-00049. PMID12538214.