SProc Categorically. - J. Robin B. Cockett; David A. Spooner (CONCUR, 1994)

A View on Implementing Processes: Categories of Circuits. - Ulrich Hensel; David A. Spooner (COMPASS/ADT, 1995)

Categories for synchrony and asynchrony. - J. Robin B. Cockett; David A. Spooner (MFPS, 1995)

Constructing Process Categories. - J. Robin B. Cockett; David A. Spooner (Theor. Comput. Sci., 1997)