formalisme lagrangien
1983 / J. L. Lagrange's early contributions to the principles and methods of mechanics / Craig Fraser / Archive for history of exact sciences 28 (1983) p. 197 [doi]
2005 / [Notes and Discussions] Shortcut to the Slingshot Effect / Kenneth J. Epstein / American Journal of Physics 73 (2005) p. 362 [doi]