Volume 4, Issue 6 (November 1992)
By Rodney M. Goodman, Charles M. Higgins, John W. Miller, Padhraic Smyth
Volume 5, Issue 6 (November 1993)
By Zheng Zeng, Rodney M. Goodman, Padhraic Smyth
Volume 9, Issue 2 (February 15, 1997)
By Padhraic Smyth, David Heckerman, Michael I. Jordan