On Iterated Minimization in Nonconvex Optimization. - Hubertus Th. Jongen; Thomas Möbert; Klaus Tammer (Math. Oper. Res., 1986)

Generalization and sharpening of some duality relations for a class of vector optimization problems. - Christiane Tammer; Klaus Tammer (ZOR Methods Model. Oper. Res., 1991)

Implicit functions and sensitivity of stationary points. - Hubertus Th. Jongen; Diethard Klatte; Klaus Tammer (Math. Program., 1991)

Two-level optimization with approximate solutions in the lower level. - Klaus Tammer (Math. Methods Oper. Res., 1995)