1. H. M. TAWANCY, A. UI-HAMID and N. M. ABBAS, ?Practical Engineering Failure Analysis? (Marcel Dekker, Inc. New York, New York, 2004) in the press.
2. H. M. TAWANCY, ?Structure and Properties of High Temperature Alloys: Applications of Analytical Electron Microscopy? (KFUPM Press, Dhahran, Saudi Arabia, 1993) p. 251.
3. J. BLACKBURN, in ?Carburization in High Temperature Process Plant Materials,? edited by J. Norton (Commission of the European Communities, Luxembourg, Publication No. EUR 7773, 1981) p. 7.
4. G. WALLWORK and J. CROLL, in ?Reviews of High-Temperature Materials,? edited by J. B. Newkirk (Freund Publishing House, London, 1976) Vol. III, p. 112.