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@article{MASLO_1980__30_4_a7, author = {Dvure\v{c}enskij, Anatolij and Pulmannov\'a, Sylvia}, title = {On the sum of observables in a logic}, journal = {Mathematica slovaca}, pages = {393--399}, publisher = {mathdoc}, volume = {30}, number = {4}, year = {1980}, mrnumber = {595300}, zbl = {0454.03030}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1980__30_4_a7/} }
Dvurečenskij, Anatolij; Pulmannová, Sylvia. On the sum of observables in a logic. Mathematica slovaca, Tome 30 (1980) no. 4, pp. 393-399. http://geodesic.mathdoc.fr/item/MASLO_1980__30_4_a7/