Bryant, R. L. (2023). On the Convex Pfaff-Darboux Theorem of Ekeland and Nirenberg. Symmetry, Integrability and Geometry: Methods and Applications.
Chicago Style (17th ed.) CitationBryant, Robert L. "On the Convex Pfaff-Darboux Theorem of Ekeland and Nirenberg." Symmetry, Integrability and Geometry: Methods and Applications 2023.
MLA (8th ed.) CitationBryant, Robert L. "On the Convex Pfaff-Darboux Theorem of Ekeland and Nirenberg." Symmetry, Integrability and Geometry: Methods and Applications, 2023.
Warning: These citations may not always be 100% accurate.