Richard H. Crawford, Ronald A. Olsson, W. Wilson Ho, Christopher E. Wee. Semantic issues in the design of languages for debugging. In James R. Cordy, Mario Barbacci, editors, ICCL 92, Proceedings of the 1992 International Conference on Computer Languages, Oakland, California, USA, 20-23 Apr 1992. pages 252-261, IEEE, 1992. [doi]