By McLafferty, F.W.
By Bertini, Ivano, Gray, Harry B., Lippard, Stephen J., Valentine, Joan S.
By Chown, Marcus
By Tietze, Lutz F., etc., Eicher, T., Ringe, D.
By Hoyle, Fred
By Kegley, Susan E., Pinhas, Allan R.
By John R. Taylor
By Carole McQuarrie
By John Harte
By James P. Collman, Louis S. Hegedus, Jack R. Norton (both at the Colorado State University, Fort Collins, USA), Richard C. Finke (University of Oregon