„Lagrange”. The American Heritage Dictionary of the English Language (5th изд.). Boston: Houghton Mifflin Harcourt. 2014. Приступљено 6. 8. 2019.CS1 одржавање: Формат датума (веза)
ams.org
mathscinet.ams.org
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 (на језику: италијански). Accademia delle Scienze di Torino. стр. 86—95. Приступљено 2. 1. 2014.CS1 одржавање: Формат датума (веза)
de Andrade Martins, Roberto (2008). „A busca da Ciência a priori no final do Seculo XVIII e a origem da Análise dimensional”. Ур.: Roberto de Andrade Martins; Lilian Al-Chueyr Pereira Martins; Cibelle Celestino Silva; Juliana Mesquita Hidalgo Ferreira. Filosofia E Historia Da Ciência No Cone Sul. 3 Encontro (на језику: португалски). AFHIC. стр. 406. ISBN978-1-4357-1633-9.
Although some authors speak of 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 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.