微扰力系统一阶近似守恒量与对称性研究
楼智美
The study of the first order approximate conserved quantities and approximate symmetries of perturbed mechanical system
LOU Zhi-mei
华东师范大学学报（自然科学版） . 2017, (3): 99 -106 .  DOI: 10.3969/j.issn.1000-5641.2017.03.011