@article{10_1090_S0894_0347_97_00246_4,
     author = {Getzler, E.},
     title = {Intersection theory on {\overline{\ensuremath{\mathscr{M}}}_{1,4}} and elliptic {Gromov-Witten} invariants},
     journal = {Journal of the American Mathematical Society},
     pages = {973--998},
     year = {1997},
     volume = {10},
     number = {4},
     doi = {10.1090/S0894-0347-97-00246-4},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-97-00246-4/}
}