@article{MZ_1987__196_173862,
     author = {Alexander I. Suciu},
     title = {Immersed {Spheres} in ....2 and {S2} x {S2.}},
     journal = {Mathematische Zeitschrift},
     pages = {51--58},
     publisher = {mathdoc},
     volume = {196},
     year = {1987},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__196_173862/}
}