The optimum shape of an hydrofoil with no cavitation A. Y. Al-Hawaj; A. H. Essawa — 1991 Revista colombiana de matematicas
A new semi-orthogonal relation for the Laguerre polynomials Shri Dhar Bajpai; A. Y. Al-Hawaj — 1993 Acta Mathematica et Informatica Universitatis Ostraviensis