J. R. Cordy, R. C. Holt and D. B. Wortman, "S/SL: Syntax/Semantic Language - Introduction and Specification", Technical Report CSRG-118, Computer Systems Research Group, University of Toronto, Sept. 1980
Barnard, D.T.; Cordy, J.R. (1988). "SL Parses the LR Languages". Computer Languages. 13 (2): 65–74. doi:10.1016/0096-0551(88)90010-0. /wiki/Doi_(identifier)
Holt, Richard C.; Cordy, James R.; Wortman, David B. (1982). "An Introduction to S/SL: Syntax/Semantic Language". ACM Transactions on Programming Languages and Systems. 4 (2): 149–178. doi:10.1145/357162.357164. https://doi.org/10.1145%2F357162.357164
Ian H. Carmichael and Stephen Perelgut. "S/SL revisited". Proc. CASCON'95, Conference of the Centre for Advanced Studies on Collaborative Research, Toronto, Canada, November 1995 http://portal.acm.org/citation.cfm?id=781915.781926 http://portal.acm.org/citation.cfm?id=781915.781926
ZMailer the Manual, http://www.zmailer.org/zman/zmanual.shtml http://www.zmailer.org/zman/zmanual.shtml