@article{NSJOM_1986_16_2a_15,
     author = {{\CYRYA}{\cyra}{\cyrn}{\cyre}{\cyrz} 

 {\CYRU}{\cyrsh}{\cyra}{\cyrn}},
     title = {k-<2> 

 - 

 {{\CYRP}{\cyro}{\cyrl}{\cyru}{\cyrs}{\cyre}{\cyrt}{\cyri}}},
     journal = {Novi Sad Journal of Mathematics},
     pages = {173-196},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1986},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1986_16_2a_15/}
}