in Proceedings of the The Thirteenth Marcel Grossmann Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Stockholm, 1.7.2012 - 7.7.2012, editor(s): Kjell Rosquist, Robert T Jantzen, Remo Ruffini, Proceedings of the MG13 Meeting on General Relativity, World Scientific, Singapore, 2015, 1071-1073.
in Proceedings of the Spanish Relativity Meeting (ERE 2010), Granada, Spain, 6.9.2010 - 10.9.2010, editor(s): Víctor Aldaya, Carlos Barceló and José Luis Jaramillo, Journal of Physics: Conference Series, Vol. 314, 2011, IOP, United Kingdom, 2011, 012111.
T. Málek
