@article{CMUC_1977_18_3_a13,
     author = {Vin\'arek, Ji\v{r}{\'\i}},
     title = {A note on direct-product decompositions},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {563--567},
     year = {1977},
     volume = {18},
     number = {3},
     mrnumber = {0457522},
     zbl = {0366.18002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1977_18_3_a13/}
}