Python, JavaScript & C++ examples - Void function, Functions in Programming that require or return a Value discussed in brief for beginners.

Jonathan Eckstein, Nonlinear Proximal Point Algorithms Using Bregman Functions, with Applications to Convex Programming, Mathematics of Operations Research, Vol. 18, No. 1 (Feb., 1993), pp. 202-226 ...

C. C. Huang, W. T. Ziemba, A. Ben-Tal, Bounds on the Expectation of a Convex Function of a Random Variable: With Applications to Stochastic Programming, Operations ...