1[1]Luz G, Innerhofer P, Haussler B, et al. Comparison of ropivacaina 0.1% and 0.2 % with bupivacaine 0.2 % for single - shot caudal anaesthesia in children peadiatr. Anaesth, 2000, 10: 499-504
2[2]Hirotek, D, Lanbert DG. Ketamine: its mechanism of action and unusual clinical uses. Br J Anaesth, 1996, 71:441-444