Thompson, E., E. Frolich, J. Bellows, B. Bassford, E. Skiko, and Mark Fox. “Process Diagnosis System (PDS) — A 30 Year History”. Proceedings of the AAAI Conference on Artificial Intelligence 29, no. 2 (January 25, 2015): 3928-3933. Accessed May 5, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/19049.