@article{10_4064_fm_53_3_309_324,
     author = {W. Hanf},
     title = {Incompactness in languages with infinitely long expressions},
     journal = {Fundamenta Mathematicae},
     pages = {309--324},
     publisher = {mathdoc},
     volume = {53},
     number = {3},
     year = {1964},
     doi = {10.4064/fm-53-3-309-324},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-53-3-309-324/}
}