Karl Crary. A syntactic account of singleton types via hereditary substitution. In James Cheney, Amy P. Felty, editors, Proceedings of the Fourth International Workshop on Logical Frameworks and Meta-Languages: Theory and Practice, LFMTP '09, McGill University, Montreal, Canada, August 2, 2009. pages 21-29, ACM, 2009. [doi]
Abstract is missing.