@article{NSJOM_1999_29_1a_6,
     author = {J. U\v{s}an},
     title = {A note 

 on n-groups for n > 3},
     journal = {Novi Sad Journal of Mathematics},
     pages = {55-60},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1999},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1999_29_1a_6/}
}