Sergey I. Vinitsky Vladimir P. Gerdt Alexander Gusev Michail S. Kaschiev V. A. Rostovtsev V. N. Samoilov T. V. Tupikova Yoshio Uwano Symbolic algorithm for factorization of the evolution operator of the time-dependent Schrödinger equation. 103-113 2006 32 Programming and Computer Software 2 http://dx.doi.org/10.1134/S0361768806020083 db/journals/pcs/pcs32.html#VinitskyGGKRSTU06