@article{DAN_1975_224_6_a17,
     author = {Yu. A. Romanovskii and L. I. Pogulyaevskii and I. A. Dubov and E. G. Ul'yanov},
     title = {On the anomaly of ionic composition of the equatorial $\mathrm{F}2$ region of the ionosphere},
     journal = {Doklady Akademii Nauk},
     pages = {1312--1314},
     publisher = {mathdoc},
     volume = {224},
     number = {6},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_224_6_a17/}
}