Black Holes: Theory and Observation: Proceedings of the 179th W.E. Heraeus Seminar Held at Bad Honnef, Germany, 18–22 August 1997 Lecture Notes in Physics, nr. 514 Editat de Friedrich W Hehl et al. 26 noi 1998 Hardback Preț: 408.46 lei 39-44 zile
