Telecommunications network operations systems: experiences in software reliability engineering. - D. A. Kropfl; Willa K. Ehrlich (ISSRE, 1995)

Assessing software reliability performance under highly critical but infrequent event occurrences. - M. S. Alam; W. H. Chen; Willa K. Ehrlich; M. E. Engel; D. A. Kropfl; P. Verma (ISSRE, 1997)