%0 Journal Article %A Sekanina, Zdeněk %T Beyer's method of cometary brightness dispersion as a criterion of cometary activity %J Acta Universitatis Carolinae. Mathematica et Physica %D 1961 %P 15-18 %V 02 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUCMP_1961__2_1_a2/ %G en %F AUCMP_1961__2_1_a2