in Proceedings of the The Fourteenth Marcel Grossmann Meeting, Rome, Italy, 12.7.2015 - 18.7.2015, editor(s): Massimo Bianchi, Robert T Jantzen, Remo Ruffini, The Fourteenth Marcel Grossmann Meeting, World Scientific, Singapore, 2017, 2542-2547.
in Proceedings of the Spanish Relativity Meeting : Almost 100 years after Einstein Revolution. (ERE 2014), Valencia, Spain, 1.9.2014 - 5.9.2014, editor(s): P. Cerdá-Durán, J. A. Font, J. M. Ibáñez, M. A. Lledó, J. Navarro-Salas and G. J. Olmo, Journal of Physics: Conference Series, Vol. 600, 2015, IOP, United Kingdom, 2015, 012040.
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.