@article{10_4064_cm_17_2_247_268,
     author = {J. S{\l}omi\'nski},
     title = {On systems of mappings between models},
     journal = {Colloquium Mathematicum},
     pages = {247--268},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1967},
     doi = {10.4064/cm-17-2-247-268},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-17-2-247-268/}
}