@article{ARM_1967_3_1_a3,
     author = {Kope\v{c}ek, Old\v{r}ich},
     title = {Allgemeine {Kardinaloperationen}},
     journal = {Archivum mathematicum},
     pages = {35--44},
     year = {1967},
     volume = {3},
     number = {1},
     mrnumber = {0221985},
     zbl = {0164.31604},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ARM_1967_3_1_a3/}
}