@article{CMUC_1968_9_2_a6,
     author = {Sichler, Ji\v{r}{\'\i}},
     title = {${\frak A} (1,1)$ can be strongly embedded into category of semigroups},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {257--262},
     year = {1968},
     volume = {9},
     number = {2},
     mrnumber = {0237395},
     zbl = {0167.28404},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1968_9_2_a6/}
}