@article{PIM_1995_N_S_57_71_a15,
     author = {Georgi \v{C}upona and Smile Markovski},
     title = {Free {Objects} in {Primitive} {Varieties} of {N-groupoids}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {147 },
     publisher = {mathdoc},
     volume = {_N_S_57},
     number = {71},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1995_N_S_57_71_a15/}
}