@article{NSJOM_1993_23_2a_22,
     author = {\v{C}upona 

 \.{G}orgi and Madar\'asz Roz\'alia Sz.},
     title = {Free poly-algebras},
     journal = {Novi Sad Journal of Mathematics},
     pages = {245-261},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1993},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1993_23_2a_22/}
}