The discrete variational principle in Hamiltonian formalism and first integrals
张宏彬, 陈立群, 刘荣万
The discrete variational principle in Hamiltonian formalism and first integrals
Zhang Hong-Bin (张宏彬), Chen Li-Qun (陈立群), Liu Rong-Wan (刘荣万)
中国物理B . 2005, (6): 1063 -1068 .  DOI: 10.1088/1009-1963/14/6/001