6 Bibliography

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Adams, S. and Ballmann, W. (1998). Amenable isometry groups of Hadamard spaces. Math. Ann. 312 183–95.
[2]
Bridson, M. R. and Haefliger, A. (1999). Metric spaces of non-positive curvature. vol 319 Springer-Verlag, Berlin.
[3]
Harpe, P. de la. (2004). Mesures finiment additives et paradoxes. In Autour du centenaire Lebesgue Panor. synthèses vol 18 pp 39–61. Soc. Math. France, Paris.
[4]
Juschenko, K. (2022). Amenability of discrete groups by examples. vol 266 American Mathematical Society, Providence, RI.
[5]
Wagon, S. (1985). The Banach-Tarski paradox. vol 24 Cambridge University Press, Cambridge.