@article{AUCMP_2007__48_1_a5,
     author = {Fla\v{s}ka, V\'aclav and Je\v{z}ek, Jaroslav and Kepka, Tom\'a\v{s}},
     title = {Transitive closures of binary relations {II.}},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {71--80},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {2007},
     mrnumber = {2517930},
     zbl = {1135.03343},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_2007__48_1_a5/}
}