1. 1. Abdalla, K. M. , Applications of the Theory of Unilateral Contact Problems in the Study of Steel Structure Joints, doctoral dissertation (in Greek), Department of Civil Engineering, Aristotle University, Thessaloniki, Greece, 1988.
2. Zur rationalen Berechnung des “Prying actions” Phänomens in Schraubenver-bindungen;Abdalla;Stahlbau,1989
3. Perception learning in engineering design;Adeli;Microcomputers in Civil Engineering,1989