@article{AUCMP_2007__48_1_a4,
     author = {Fla\v{s}ka, V\'aclav and Je\v{z}ek, Jaroslav and Kepka, Tom\'a\v{s} and Kortelainen, Juha},
     title = {Transitive closures of binary relations. {I.}},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {55--69},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {2007},
     mrnumber = {2517929},
     zbl = {1158.06301},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_2007__48_1_a4/}
}