Menelaos I. Karavelas, Eleni Tzanaki. Convex hulls of spheres and convex hulls of convex polytopes lying on parallel hyperplanes. In Ferran Hurtado, Marc J. van Kreveld, editors, Proceedings of the 27th ACM Symposium on Computational Geometry, Paris, France, June 13-15, 2011. pages 397-406, ACM, 2011. [doi]
Abstract is missing.