@article{DAN_1963_149_4_a21,
     author = {I. I. Grandberg and A. N. Kost and Yu. A. Naumov},
     title = {Generality of regroupings with the rupture of $\mathrm{N}$ -- $\mathrm{N}$ or 
},
     journal = {Doklady Akademii Nauk},
     pages = {838--841},
     publisher = {mathdoc},
     volume = {149},
     number = {4},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_149_4_a21/}
}