@article{MZ_1993__212_4_174475,
     author = {L.M. Lopez},
     title = {Small knots in {Seifert} fibered 3-manifolds.},
     journal = {Mathematische Zeitschrift},
     pages = {123--140},
     publisher = {mathdoc},
     volume = {212},
     number = {4},
     year = {1993},
     zbl = {0789.57009},
     url = {http://geodesic.mathdoc.fr/item/MZ_1993__212_4_174475/}
}