Vilhelm Sjöberg, Stephanie Weirich. Programming up to Congruence. In Sriram K. Rajamani, David Walker, editors, Proceedings of the 42nd Annual ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, POPL 2015, Mumbai, India, January 15-17, 2015. pages 369-382, ACM, 2015. [doi]