@ARTICLE{
author={Czedli Gabor,Erne M,Seselja Branimir M,Tepavcevic Andreja P},
year={2009},
title={Characteristic triangles of closure operators with applications in general algebra},
journal={ALGEBRA UNIVERSALIS},
volume={62},
number={4},
pages={399-418},
document_type={Article},
} 

@ARTICLE{
author={Erne M,Seselja Branimir M,Tepavcevic Andreja P},
year={2003},
title={Posets generated by irreducible elements},
journal={ORDER-A JOURNAL ON THE THEORY OF ORDERED SETS AND ITS APPLICATIONS},
volume={20},
number={1},
pages={79-89},
document_type={Article},
}