@article{DAN_1978_242_4_a13,
     author = {G. M. Grechko and G. M. Nikol'skii and Yu. V. Romanenko and S. A. Savchenko and A. I. Simonov},
     title = {Nocturnal ``equatorial ring'' in the $F$-region},
     journal = {Doklady Akademii Nauk},
     pages = {796--799},
     publisher = {mathdoc},
     volume = {242},
     number = {4},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_242_4_a13/}
}