@article{10_4064_cm_8_1_15_17,
     author = {W. Nitka},
     title = {Self-dependent elements in abstract algebras},
     journal = {Colloquium Mathematicum},
     pages = {15--17},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1961},
     doi = {10.4064/cm-8-1-15-17},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-8-1-15-17/}
}