@article{ARM_1984_20_1_a1,
     author = {Slatinsk\'y, Emil},
     title = {Die arithmetische {Operation} der {Summe}},
     journal = {Archivum mathematicum},
     pages = {9--20},
     year = {1984},
     volume = {20},
     number = {1},
     mrnumber = {785042},
     zbl = {0554.06007},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ARM_1984_20_1_a1/}
}