1. Allen D. E. Errors In Concrete Structures Structures Section Division of Building Research National Research Council of Canada Ottawa Ontario Canada 1979.
2. Allen D. E. and Schriever W. R. “Progressive Collapse Abnormal Loads and Building Codes ” Structural Failures: Modes Causes Responsibilities ASCE National Meeting on Structural Engineering Cleveland Ohio Apr. 1972 pp. 21–47.
3. “Bridge Builder State Failed To Go By Book. Zilwaukee Study Cites Loading Missing Cables ” The Detroit News Feb. 20 1983.
4. “Commuters Buried Two Die As 5‐Ton Ceiling Caves In ” New York Post Aug. 9 1983.
5. “Failure Archive Readied for Use ” Engineering News Record July 7 1983.