@article{10_21136_MB_1997_125916,
     author = {Kar\'asek, Ji\v{r}{\'\i}},
     title = {Double $n$-ary relational structures},
     journal = {Mathematica Bohemica},
     pages = {169--174},
     publisher = {mathdoc},
     volume = {122},
     number = {2},
     year = {1997},
     doi = {10.21136/MB.1997.125916},
     mrnumber = {1460946},
     zbl = {0890.08001},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/MB.1997.125916/}
}