@article{CMUC_1978_19_2_a5,
     author = {Ml\v{c}ek, Josef},
     title = {End-extensions of countable structures and the induction schema},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {291--308},
     year = {1978},
     volume = {19},
     number = {2},
     mrnumber = {0491147},
     zbl = {0372.02030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1978_19_2_a5/}
}