@article{MZ_1971__121_171557,
     author = {G. Ananda Swarup},
     title = {Pseudo-Isotopies of {S3} x {S1.}},
     journal = {Mathematische Zeitschrift},
     pages = {201--205},
     publisher = {mathdoc},
     volume = {121},
     year = {1971},
     zbl = {0212.56101},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__121_171557/}
}