Geodesic
Curvature and Radius of Curvature for Functions with Bounded Boundary Rotation
Canadian journal of mathematics, Tome 25 (1973) no. 5, pp. 1015-1023

Voir la notice de l'article provenant de la source Cambridge University Press

For k ≧ 2 denote by Vk the class of functions f regular in and having the representation (1.1) where μ is a real-valued function of bounded variation on [0, 2π] with (1.2) Vk is the class of functions with boundary rotation at most kπ. 
Noonan, J. W. Curvature and Radius of Curvature for Functions with Bounded Boundary Rotation. Canadian journal of mathematics, Tome 25 (1973) no. 5, pp. 1015-1023. doi: 10.4153/CJM-1973-109-6
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