Homogeneous Linear fuzzy Functions and Ranking Methods in fuzzy Linear Programming Problems. - Francisco Herrera; José L. Verdegay; Margit Kovács (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 1994)

Flexible linear programs with a restricted overall flexibility level. - Robert Fullér; Margit Kovács; György Schuster (Fuzzy Sets Syst., 2002)