Two kinds of generalized gradient representationsfor holonomic mechanical systems
梅凤翔, 吴惠彬
Two kinds of generalized gradient representationsfor holonomic mechanical systems
Feng-Xiang Mei(梅凤翔) and Hui-Bin Wu(吴惠彬)
中国物理B . 2016, (1): 14502 -014502 .  DOI: 10.1088/1674-1056/25/1/014502