by 정의택, Yi Taeg Jeong, 최흥철, Hong Cheol Choi, 임소
Published in The Korean journal of pain (1996)

by 함영돈, Young Don Ham, 정용중, Yong Choong Chung, 강화자, Wha Ja Kang, 이두익, Doo Ik Lee, 신광일, Kwang II Shin
Published in Korean journal of anesthesiology (30.12.1983)