1. G.A. Anastassiou, Moments in Probability and Approximation Theory, Pitman Research Notes in Mathematics, vol. 287 (Longman Scientific & Technical, Harlow, 1993)
2. G.A. Anastassiou, Lattice homomorphism - Korovkin type inequalities for vector valued functions. Hokkaido Math. J. 26, 337–364 (1997)
3. G.A. Anastassiou, Quantitative Approximations (Chapman & Hall/CRC, Boca Raton, 2001)
4. G.A. Anastassiou, Intelligent Computations: Abstract Fractional Calculus, Inequalities, Approximations (Springer, Heidelberg, 2018)
5. G.A. Anastassiou, Complex Korovkin theory, J. Comput. Anal. Appl. 28(6), 981–996 (2020)