@article{NSJOM_1988_18_1a_3,
     author = {{\CYRYA}{\cyra}{\cyrn}{\cyre}{\cyrz} 

 {\CYRU}{\cyrsh}{\cyra}{\cyrn}},
     title = {{\CYRO} 

 {\cyro}{\cyrd}{\cyrn}{\cyro}{\cyrm} {\cyrk}{\cyrl}{\cyra}{\cyrs}{\cyrs}{\cyre} 

 {<Nn,E>-{\cyrs}{\cyre}{\cyrt}{\cyrya}{\cyrh}} 

 {\cyrs} <n+1>-{\cyrr}{\cyra}{\cyrs}{\cyrt}{\cyro}{\cyrya}{\cyrn}{\cyri}{\cyre}{\cyrm}},
     journal = {Novi Sad Journal of Mathematics},
     pages = {31-43},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1988},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1988_18_1a_3/}
}