Citazione Stile APA (7a Edizione)

Li, B., & Zhao, W. (2025). Hilbert's fourth problem in the constant curvature setting.

Citazione stile Chigago Style (17a edizione)

Li, Benling, e Wei Zhao. Hilbert's Fourth Problem in the Constant Curvature Setting. 2025.

Citatione MLA (9a ed.)

Li, Benling, e Wei Zhao. Hilbert's Fourth Problem in the Constant Curvature Setting. 2025.