@article{10_21136_CMJ_1991_102485,
     author = {Pond\v{e}l{\'\i}\v{c}ek, Bed\v{r}ich},
     title = {On varieties of regular $*$-semigroups, {II}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {512--517},
     publisher = {mathdoc},
     volume = {41},
     number = {3},
     year = {1991},
     doi = {10.21136/CMJ.1991.102485},
     mrnumber = {1117804},
     zbl = {0747.20028},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102485/}
}