1. Alexander, S., Kapovitch, V., Petrunin, A.: Alexandrov meets Kirszbraun. In: Proceedings of the Gökova Geometry-Topology Conference: 88–109, p. 2011. Press, Somerville, MA, Int (2010)
2. Figalli, A., Rifford, L., Villani, C.: Necessary and sufficient conditions for continuity of optimal transport maps on Riemannian manifolds. Tohoku Math. J. 2, 63 (2011)
3. Lang, U., Schroeder, V.: Kirszbraun’s theorem and metric spaces of bounded curvature. Geom. Funct. Anal. 7(3), 535–560 (1997)
4. Lebedeva, N.: Alexandrov spaces with maximal number of extremal points Geom. Topol. 19(3), 1493–1521 (2015)
5. Lebedeva, N., Petrunin, A., Zolotov, V.: Bipolar comparison. (2017)
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