Jiangchao Liu, Xavier Rival. Abstraction of Optional Numerical Values. In Xinyu Feng, Sungwoo Park, editors, Programming Languages and Systems - 13th Asian Symposium, APLAS 2015, Pohang, South Korea, November 30 - December 2, 2015, Proceedings. Volume 9458 of Lecture Notes in Computer Science, pages 146-166, Springer, 2015. [doi]
Abstract is missing.