Gentili, A. et al. 2012. Cardiocirculatory intraoperative assessment during single-shot caudal anaesthesia in children: comparison between levobupivacaine and ropivacaine. La Pediatria Medica e Chirurgica. 34, 3 (Jun. 2012). DOI:https://doi.org/10.4081/pmc.2012.79.