↑Chung, Min Young; You, Jae Uck; Sung, Dan Keun; Choi, Bong Dae (September 1999). "Performability analysis of common-channel signaling networks, based on signaling system 7". IEEE Transactions on Reliability. 48 (3): 224–233. doi:10.1109/24.799844. ISSN1558-1721.