Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{PMFA_1956__1_2_a1, author = {Alpert, J. L.}, title = {Ionosf\'era}, journal = {Pokroky matematiky, fyziky a astronomie}, pages = {145--155}, publisher = {mathdoc}, volume = {01}, number = {2}, year = {1956}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/PMFA_1956__1_2_a1/} }
Alpert, J. L. Ionosféra. Pokroky matematiky, fyziky a astronomie, Tome 01 (1956) no. 2, pp. 145-155. http://geodesic.mathdoc.fr/item/PMFA_1956__1_2_a1/