@article{AIF_1981__31_2_1_0,
     author = {Tsuboi, Takashi},
     title = {On 2-cycles of $B~{\rm Diff}(S^1)$ which are represented by foliated $S^1$-bundles over $T^2$},
     journal = {Annales de l'Institut Fourier},
     pages = {1--59},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {31},
     number = {2},
     year = {1981},
     doi = {10.5802/aif.828},
     mrnumber = {84b:57019},
     zbl = {0439.57018},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.828/}
}