@article{10_21136_CMJ_1982_101785,
     author = {Mo\v{c}ko\v{r}, Ji\v{r}{\'\i}},
     title = {Semivaluations and $d$-groups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {77--89},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1982},
     doi = {10.21136/CMJ.1982.101785},
     mrnumber = {646713},
     zbl = {0499.06013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101785/}
}