@article{10_4064_cm_17_2_225_234,
     author = {G. Gr\"atzer},
     title = {On a new notion of independence in universal algebras},
     journal = {Colloquium Mathematicum},
     pages = {225--234},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1967},
     doi = {10.4064/cm-17-2-225-234},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-17-2-225-234/}
}