@article{NSJOM_1986_16_1a_13,
     author = {{\CYRYA}{\cyra}{\cyrn}{\cyre}{\cyrz} 

 {\CYRU}{\cyrsh}{\cyra}{\cyrn}},
     title = {LN-k 

 {\cyri} {RN-k-{\cyrp}{\cyro}{\cyrl}{\cyru}{\cyrs}{\cyre}{\cyrt}{\cyri}}},
     journal = {Novi Sad Journal of Mathematics},
     pages = {161-179},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1986},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1986_16_1a_13/}
}