@article{DAN_1990_311_5_a13,
     author = {\`E. V. Borodzich and M. R. Korotkina and E. V. Lobanov and A. P. Shmakov},
     title = {On the origin of ring structures},
     journal = {Doklady Akademii Nauk},
     pages = {1081--1085},
     publisher = {mathdoc},
     volume = {311},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_311_5_a13/}
}