@article{NSJOM_1993_23_2a_26,
     author = {Stojmenovi\'c Ivan and Jerini\'c Ljubomir},
     title = {Classification of some 

 modifications of the propositional algebra},
     journal = {Novi Sad Journal of Mathematics},
     pages = {305-319},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1993},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1993_23_2a_26/}
}