@article{NSJOM_1989_19_2a_10,
     author = {{\CYRU}{\cyrsh}{\cyra}{\cyrn} 

 {\CYRYA}{\cyra}{\cyrn}{\cyre}{\cyrz}},
     title = {n-{\CYRR}{\cyre}{\cyrsh}{\cyre}{\cyrt}{\cyrk}{\cyri}},
     journal = {Novi Sad Journal of Mathematics},
     pages = {105-118},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1989},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1989_19_2a_10/}
}