Li, Yuancheng; Liang, Jinghui; Zhang, Yi; Mei, Fengxiang Lie symmetries and conserved quantities of nonholonomic systems of non-Chetaev’s type with unilateral constraints. (Chinese. English summary) Zbl 0969.70015 J. Beijing Inst. Technol., Chin. Ed. 20, No. 2, 150-154 (2000). MSC: 70G65 70F25 PDFBibTeX XMLCite \textit{Y. Li} et al., J. Beijing Inst. Technol., Chin. Ed. 20, No. 2, 150--154 (2000; Zbl 0969.70015)
Li, Yuancheng; Liang, Jinghui; Zhang, Yi; Mei, Fengxiang Conservation laws for the system with unilateral holonomic constraints in event space. (Chinese. English summary) Zbl 0962.70022 J. Beijing Inst. Technol., Chin. Ed. 20, No. 1, 21-24 (2000). MSC: 70H33 70F20 70G10 PDFBibTeX XMLCite \textit{Y. Li} et al., J. Beijing Inst. Technol., Chin. Ed. 20, No. 1, 21--24 (2000; Zbl 0962.70022)