Edited by Ignazio Ciufolini. (2003).  2001: A relativistic spacetime odyssey : proceedings of the Johns Hopkins Workshop on Current Problems in Particle Theory 25, Firenze, 2001 (September 3-5.  World Scientific.

 Edited by Ignazio Ciufolini.  2001: A Relativistic Spacetime Odyssey : Proceedings of the Johns Hopkins Workshop On Current Problems in Particle Theory 25, Firenze, 2001 (September 3-5.  World Scientific, 2003.

 Edited by Ignazio Ciufolini.  2001: A Relativistic Spacetime Odyssey : Proceedings of the Johns Hopkins Workshop On Current Problems in Particle Theory 25, Firenze, 2001 (September 3-5.  World Scientific, 2003.