Bryant, R. L. (2023). On the Convex Pfaff-Darboux Theorem of Ekeland and Nirenberg. Symmetry, Integrability and Geometry: Methods and Applications.
Chicago-Zitierstil (17. Ausg.)Bryant, Robert L. "On the Convex Pfaff-Darboux Theorem of Ekeland and Nirenberg." Symmetry, Integrability and Geometry: Methods and Applications 2023.
MLA-Zitierstil (8. Ausg.)Bryant, Robert L. "On the Convex Pfaff-Darboux Theorem of Ekeland and Nirenberg." Symmetry, Integrability and Geometry: Methods and Applications, 2023.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.