1. No two quotients of normalized binomial mid-coefficients are equal;Bang;J. Number Theory,1990
2. Liouville's operator for a disc in space;Berg;Manuscripta Math.,1990
3. C. Berg, J. Lützen, J. Liouville's unpublished work on an integral operator in potential theory, A historical and mathematical analysis, Exposition. Math. 8 Fasc. 2 (1990).
4. Means and Their Inequalities;Bullen,1988
5. On some gamma function inequalities;Dutka;SIAM J. Math. Anal.,1985