Galletto, D., The genesis of Mécanique analytique, La Mécanique analytique de Lagrange et son héritage, II (Turin, 1989). Atti Accad. Sci. Torino Cl. Sci. Fis. Mat. Natur. 126 (1992), suppl. 2, 277–370, MR1264671.
archive.org
Angelo Genocchi (1883). "Luigi Lagrange". Il primo secolo della R. Accademia delle Scienze di Torino (in Italian). Accademia delle Scienze di Torino. pp. 86–95. Retrieved 2 January 2014.
de Andrade Martins, Roberto (2008). "A busca da Ciência a priori no final do Seculo XVIII e a origem da Análise dimensional". In Roberto de Andrade Martins; Lilian Al-Chueyr Pereira Martins; Cibelle Celestino Silva; Juliana Mesquita Hidalgo Ferreira (eds.). Filosofia E Historia Da Ciência No Cone Sul. 3 Encontro (in Portuguese). AFHIC. p. 406. ISBN978-1-4357-1633-9.
Although some authors speak of a general method of solving "isoperimetric problems", the eighteenth-century meaning of this expression amounts to "problems in variational calculus", reserving the adjective "relative" for problems with isoperimetric-type constraints. The celebrated method of Lagrange multipliers, which applies to the optimization of functions of several variables subject to constraints, did not appear until much later. See Fraser, Craig (1992). "Isoperimetric Problems in the Variational Calculus of Euler and Lagrange". Historia Mathematica. 19: 4–23. doi:10.1016/0315-0860(92)90052-D.
Lagrange, Joseph-Louis; Laplace, Pierre-Simon (1795). "Mathématiques". Séances des écoles normales, recueillies par des sténographes, et revues par les professeurs. Seconde partie. Débats. Tome premier. Paris: L. Reynier. pp. 3–23. OCLC780161317.
"Avertissement". Séances des Écoles normales, recueillies par des sténographes, et revues par les professeurs. Nouvelle édition. Leçons. Tome premier. Paris: Cercle-Social. 1795. pp. iii–viii. OCLC490193660.