@ARTICLE{
author={Dudek WA,Stojakovic Zoran M},
year={2001},
title={On Rusakov's n-ary rs-groups},
journal={CZECHOSLOVAK MATHEMATICAL JOURNAL},
volume={51},
number={2},
pages={275-283},
document_type={Article},
} 

@ARTICLE{
author={Dudek WA,Jun YB,Stojakovic Zoran M},
year={2001},
title={On fuzzy ideals in BCC-algebras},
journal={FUZZY SETS AND SYSTEMS},
volume={123},
number={2},
pages={251-258},
document_type={Article},
}