Levine, Jack; Katzin, Gerald H. A class of symmetries for conservative dynamical systems. (English) Zbl 0681.70002 Tensor, New Ser. 46, 35-43 (1987). MSC: 70A05 70H03 37J99 × Cite Format Result Cite Review PDF
Vujičić, Veljko The modification of analytical dynamics of rheonomic systems. (English) Zbl 0677.70019 Tensor, New Ser. 46, 418-433 (1987). MSC: 70H03 70G10 37J99 × Cite Format Result Cite Review PDF