@article{10_4064_fm_81_2_121_132,
     author = {William Powell},
     title = {Variations of {Keisler's} theorem for complete embeddings},
     journal = {Fundamenta Mathematicae},
     pages = {121--132},
     publisher = {mathdoc},
     volume = {81},
     number = {2},
     year = {1973},
     doi = {10.4064/fm-81-2-121-132},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-81-2-121-132/}
}