@article{DAN_1975_222_1_a14, author = {G. M. Martynkevich}, title = {On the nature and mechanisms of $17^+$, $18^+$, $19^+$, and $44^+$ ion formation in the upper atmosphere}, journal = {Doklady Akademii Nauk}, pages = {72--75}, publisher = {mathdoc}, volume = {222}, number = {1}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1975_222_1_a14/} }