@article{CRMATH_2013__351_5-6_209_0,
     author = {Richard, Serge and Tiedra de Aldecoa, Rafael},
     title = {Explicit formulas for the {Schr\"odinger} wave operators in $ {\mathbb{R}}^{2}$},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {209--214},
     publisher = {Elsevier},
     volume = {351},
     number = {5-6},
     year = {2013},
     doi = {10.1016/j.crma.2013.03.006},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2013.03.006/}
}