Balaž , AntunVidanović , IvanaStojiljković , DanicaVudragović , DušanBelić , Aleksandar and Bogojević , Aleksandar. (2012). SPEEDUP Code for Calculation of Transition Amplitudes via the Effective Action Approach.
Communications in Computational Physics. 11 (3).
739-755.
doi:10.4208/cicp.131210.180411a