@article{AL_1965_4_2_a4,
     author = {Jan Mycielski},
     title = {On unions of denumerable models},
     journal = {Algebra i logika},
     pages = {57--58},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1965},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AL_1965_4_2_a4/}
}