@article{10_4064_fm_48_2_113_121,
     author = {J. {\L}o\'s and J. S{\l}omi\'nski and R. Suszko},
     title = {On extending of models {V.} {Embedding} theorems for relational models},
     journal = {Fundamenta Mathematicae},
     pages = {113--121},
     publisher = {mathdoc},
     volume = {48},
     number = {2},
     year = {1959},
     doi = {10.4064/fm-48-2-113-121},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-48-2-113-121/}
}