1. Lectures on Spaces of Nonpositive Curvature;Ballmann,1995
2. K. Bartoszek, J. Signerska, The fundamental group, covering spaces and topology in biology, preprint
3. Mass transportation and rough curvature bounds for discrete spaces;Bonciocat;J. Funct. Anal.,2009
4. A Course in Metric Geometry;Burago,2001
5. A Riemannian interpolation à la Borell, Brascamp and Lieb;Cordero-Erausquin;Invent. Math.,2001