1. Orthogonal Polynomials;Szegö,1959
2. Orthogonale Polynome;Freud,1969
3. English translation by I. Földes, Pergamon Press, London/Toronto/New York, 1971.
4. On two polynomial inequalities, I;Freud;Acta Math. Acad. Sci. Hungar.,1971
5. On two polynomial inequalities, II;Freud;Acta Math. Acad. Sci. Hungar.,1972