@article{MASLO_2002_52_2_a3,
     author = {Chajda, Ivan and Hala\v{s}, Radom{\'\i}r},
     title = {Algebraic properties of pre-logics},
     journal = {Mathematica slovaca},
     pages = {157--175},
     year = {2002},
     volume = {52},
     number = {2},
     mrnumber = {1935115},
     zbl = {1007.08003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2002_52_2_a3/}
}