@article{10_1090_S1079_6762_97_00037_1,
     author = {Sullivan, Michael},
     title = {Invariants of twist-wise flow equivalence},
     journal = {Electronic research announcements of the American Mathematical Society},
     pages = {126--130},
     publisher = {mathdoc},
     volume = {03},
     year = {1997},
     doi = {10.1090/S1079-6762-97-00037-1},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-97-00037-1/}
}