@article{MZ_1983__183_173328,
     author = {Stehen Markvorsen},
     title = {A {Sufficient} {Condition} for a {Compact} {Immersion} to be {Spherical.}},
     journal = {Mathematische Zeitschrift},
     pages = {407--412},
     publisher = {mathdoc},
     volume = {183},
     year = {1983},
     zbl = {0498.53040},
     url = {http://geodesic.mathdoc.fr/item/MZ_1983__183_173328/}
}