M. A. Bashar, G. Krishnan, M. G. Kuhn, E. H. Spafford, and S. S. Wagstaff. Low-Threat Security Patches and Tools. In M. J. Harrold and Giuseppe Visaggio, editors, Proceedings of the 1997 IEEE International Conference on Software Maintenance, pages 306-313, Bari, Italy, September 29-October 3, 1997.