@article{KYB_1969_5_3_a2,
     author = {Mare\v{s}, Jan},
     title = {Dv\v{e} vlastnosti v\'yraz\r{u} v jist\'e voln\'e univerz\'aln{\'\i} algeb\v{r}e},
     journal = {Kybernetika},
     pages = {190--200},
     year = {1969},
     volume = {5},
     number = {3},
     mrnumber = {0246808},
     zbl = {0176.28701},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/KYB_1969_5_3_a2/}
}