"Calcolo delle variazioni - Storia - Sec.19." . . "Variationsrechnung." . . "Calcul des variations 19e siècle." . . "Geschichte." . . "Calcul des variations." . . "calcul des variations 19e s." . . "Càlcul de variacions." . . "Càlcul de variacions Història S. XIX." . . "S. XIX" . . "Rachunek wariacyjny historia." . . "Calculus of variations." . . . . . . . . . "A history of the calculus of variations during the 19th century" . . . . . . . . . "A History of the calculus of variations : during the Nineteenth Century" . "A history of the Calculus of Variations during the nineteenth century" . "Calculus of variations" . . . . . . . . . . "A history of the calculus of variations during the nineteenth century" . "A history of the calculus of variations during the nineteenth century"@en . . . . . . "A history of the calculus of variations, during the nineteenth century"@en . . . . "A history of the calculus of variations during their nineteenth century"@en . . . . . "A history of the calculus of variations: during the nineteenth century" . . "A history of the calculus of variations : during the nineteenth century" . . "A History of the Calculus of Variations" . . "A history of the calculus of variations during the 19th [nineteenth] century" . "History of the progress of the calculus of variations during the nineteenth century" . . "History of the progress of the calculus of variations during the nineteenth century"@en . "A history of the calculus of variation : during the nineteenth century" . . . . . . . . . . . "Matematica (Historia)" . .