Approximation Of Continuous Functions By Monotone Sequences Of Polynomials With Integral Coefficients S. G. Gal — 1991 Publications de l'Institut Mathématique
On the minimal displacement of points under mappings A. I. Ban; S. G. Gal — 2002 Archivum Mathematicum New contributions concerning the minimal displacement of points under mappings (defect of fixed point) are obtained.