@article{NUMA_1991__59_8_133538,
     author = {G.D. Akrivis and V.A. Dougalis and ...},
     title = {On fully discrete {Galerkin} methods of second-order temporal accuracy for the nonlinear {Schr\"odinger} equation.},
     journal = {Numerische Mathematik},
     pages = {31--54},
     publisher = {mathdoc},
     volume = {59},
     number = {8},
     year = {1991},
     zbl = {0739.65096},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1991__59_8_133538/}
}