@article{10_21136_CMJ_1975_101289,
     author = {Pond\v{e}l{\'\i}\v{c}ek, Bed\v{r}ich},
     title = {On weakly commutative semigroups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {20--23},
     year = {1975},
     volume = {25},
     number = {1},
     doi = {10.21136/CMJ.1975.101289},
     mrnumber = {0387460},
     zbl = {0307.20039},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1975.101289/}
}