@article{CMUC_1982_23_2_a8,
     author = {Demlov\'a, M. and Demel, Ji\v{r}{\'\i} and Koubek, V\'aclav},
     title = {Simplicity of algebras requires to investigate almost all operations},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {325--335},
     year = {1982},
     volume = {23},
     number = {2},
     mrnumber = {664977},
     zbl = {0518.08001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1982_23_2_a8/}
}