@article{10_4007_annals_2004_159_935,
     author = {Eleny-Nicoleta Ionel and Thomas H. Parker},
     title = {The symplectic sum formula for {Gromov{\textendash}Witten} invariants},
     journal = {Annals of mathematics},
     pages = {935--1025},
     publisher = {mathdoc},
     volume = {159},
     number = {3},
     year = {2004},
     doi = {10.4007/annals.2004.159.935},
     mrnumber = {2113018},
     zbl = {1075.53092},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2004.159.935/}
}