Vehicle routing and scheduling with fuzzy time windows and fuzzy goal. - Przemyslaw Kobylanski; Michal Kulej (EUSFLAT Conf., 2003)

The 0-1 knapsack problem with fuzzy data. - Adam Kasperski; Michal Kulej (Fuzzy Optim. Decis. Mak., 2007)

Choosing robust solutions in discrete optimization problems with fuzzy costs. - Adam Kasperski; Michal Kulej (Fuzzy Sets Syst., 2009)