SPMNet: a formal methodology for software management. - Carl K. Chang; Chikuang Chao; Su-Yin Hsieh; Yahya Alsalqan (COMPSAC, 1994)

Software Project Management Net: A New Methodology on Software Management. - Carl K. Chang; Chikuang Chao; Thinh T. Nguyen; Mark J. Christensen (COMPSAC, 1998)