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@article{AUCMP_1961__2_1_a1, author = {Sekanina, Zden\v{e}k}, title = {Periodical changes in the activity of the {Encke} comet}, journal = {Acta Universitatis Carolinae. Mathematica et Physica}, pages = {7--14}, publisher = {mathdoc}, volume = {02}, number = {1}, year = {1961}, language = {en}, url = {http://geodesic.mathdoc.fr/item/AUCMP_1961__2_1_a1/} }
Sekanina, Zdeněk. Periodical changes in the activity of the Encke comet. Acta Universitatis Carolinae. Mathematica et Physica, Tome 02 (1961) no. 1, pp. 7-14. http://geodesic.mathdoc.fr/item/AUCMP_1961__2_1_a1/