@article{NSJOM_1987_17_2a_5,
     author = {{\CYRYA}{\cyra}{\cyrn}{\cyre}{\cyrz} 

 {\CYRU}{\cyrsh}{\cyra}{\cyrn}},
     title = {<Nn,E>-{\cyrs}{\cyre}{\cyrt}{\cyri} 

 {\cyrs} (n+1) 

 {\textendash}{\cyrr}{\cyra}{\cyrs}{\cyrs}{\cyrt}{\cyro}{\cyrya}{\cyrn}{\cyri}{\cyre}{\cyrm}},
     journal = {Novi Sad Journal of Mathematics},
     pages = {65-87},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1987_17_2a_5/}
}