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@article{KYB_1967__3_1_a2, author = {Havrda, Jan and Charv\'at, Franti\v{s}ek}, title = {Quantification method of classification processes. {Concept} of structural $a$-entropy}, journal = {Kybernetika}, pages = {--35}, publisher = {mathdoc}, volume = {03}, number = {1}, year = {1967}, mrnumber = {0209067}, zbl = {0178.22401}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KYB_1967__3_1_a2/} }
Havrda, Jan; Charvát, František. Quantification method of classification processes. Concept of structural $a$-entropy. Kybernetika, Tome 03 (1967) no. 1, p. 35. http://geodesic.mathdoc.fr/item/KYB_1967__3_1_a2/