@article{JTNB_2014__26_3_709_0,
     author = {Heumann, Jay and Vatsal, Vinayak},
     title = {Modular symbols, {Eisenstein} series, and congruences},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {709--756},
     publisher = {Soci\'et\'e Arithm\'etique de Bordeaux},
     volume = {26},
     number = {3},
     year = {2014},
     doi = {10.5802/jtnb.886},
     mrnumber = {3320499},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/jtnb.886/}
}