@article{IM_1996__123_3_144344,
     author = {Tomotada Ohtsuki},
     title = {A polynomial invariant of rational homology 3-spheres.},
     journal = {Inventiones mathematicae},
     pages = {241--258},
     year = {1996},
     volume = {123},
     number = {3},
     zbl = {0855.57016},
     url = {http://geodesic.mathdoc.fr/item/IM_1996__123_3_144344/}
}