Unertl K E, Lenhart F P, Forst H, Vogler G, Wilm V, Ehret W, Ruckdeschel G
Institut fuer Anaesthesiologie, Ludwig-Maximilians-Universitat Muenchen, Federal Republic of Germany.
Am J Med. 1989 Nov 30;87(5A):128S-131S. doi: 10.1016/0002-9343(89)90041-7.