The Elements of the Calculus of Variations
According to Jacobi, a treatise with this title was read to the Berlin Academy on September 16, 1756. According to St. Petersburg Academy records, it was presented to that Academy on December 1, 1760.
Original Source Citation
Novi Commentarii academiae scientiarum Petropolitanae, Volume 10, pp. 51-93.
Opera Omnia Citation
Series 1, Volume 25, pp.141-176.