Functional Equations in Mathematical Analysis Themistocles M. Rassias, Janusz Brzdek E-Book (pdf)

Approximation and Computation Walter Gautschi, Giuseppe Mastroianni, Themistocles M. Rassias E-Book (pdf)

Recent Advances in Constructive Approximation Theory Vijay Gupta, Themistocles M. Rassias, P. N. Agrawal E-Book (pdf)