@article{10_4064_cm_8_1_23_26,
     author = {A. Lelek},
     title = {Some remarks on symmetric relations},
     journal = {Colloquium Mathematicum},
     pages = {23--26},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1961},
     doi = {10.4064/cm-8-1-23-26},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-8-1-23-26/}
}