@article{10_21136_CMJ_1986_102108,
     author = {Pond\v{e}l{\'\i}\v{c}ek, Bed\v{r}ich},
     title = {Tolerance distributive and tolerance modular varieties of commutative semigroups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {485--488},
     publisher = {mathdoc},
     volume = {36},
     number = {3},
     year = {1986},
     doi = {10.21136/CMJ.1986.102108},
     mrnumber = {0847775},
     zbl = {0614.20043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1986.102108/}
}