@article{MZ_1990__204_3_183770,
     author = {Dirk FERUS and Franz Pedit},
     title = {S1-equivariant {Minimal} {Tori} in {S4} and {S1-equivariant} {Willmore} {Tori} in {S3.}},
     journal = {Mathematische Zeitschrift},
     pages = {269--282},
     publisher = {mathdoc},
     volume = {204},
     number = {3},
     year = {1990},
     zbl = {0722.53056},
     url = {http://geodesic.mathdoc.fr/item/MZ_1990__204_3_183770/}
}