Duca, Eugenia. “Pseudo-Geometric Inequalities”. Anal. Numér. Théor. Approx. 16, no. 2 (August 1, 1987): 127–132. Accessed December 2, 2025. https://www.ictp.acad.ro/jnaat/journal/article/view/1987-vol16-no2-art5.