• Tanaka, Keishi
• Hassler, D. M.
• Hollinger, Veronica
• Simmers, Gary

Extrapolation (1992), 33, (1), 101–110.

• Smith, Bobby L.
• Widdicombe, Toby
• Simmers, Gary
• Erlich, Richard D.

Extrapolation (1992), 33, (4), 360–373.

• Clareson, Thomas D.
• Simmers, Gary
• Hassler, Donald M.

Extrapolation (1991), 32, (4), 361–374.