Gupta, Vijay. Recent advances in constructive approximation theory / By Vijay Gupta, Themistocles M Rassias and P N Agrawal. - 1st Ed. - New Delhi : Springer, 2018. - 291p. ; 00 cm. ISBN: 9783319921648 Subjects--Topical Terms: MATHEMATICS. Dewey Class. No.: 511.4 / GUP