The usual reference is this[1] paper which outlines most well-known results on biconvexity and optimiality thereof. [1] http://www2.math.uni-wuppertal.de/~klam

The usual reference is this[1] paper which outlines most well-known results on biconvexity and optimiality thereof. [1] http://www2.math.uni-wuppertal.de/~klamroth/publications/gopfkl07.pdf http://www2.math.uni-wuppertal.de/~klamroth/publications/gop...