On necessary and sufficient optimality conditions for multicriterial optimization problems. - Tilo Staib (ZOR Methods Model. Oper. Res., 1991)

Necessary Optimality Conditions for Nonsmooth Multicriterial Optimization Problems. - Tilo Staib (SIAM J. Optim., 1992)

Optimality conditions for state constrained nonlinear control problems. - Manfred Dobrowolski; Tilo Staib (Math. Methods Oper. Res., 1995)