TY  - GEN
AU  - Hawking, Stephen
AU  - Penrose, Roger 
TI  - Nature of space and time: with a new afterward by the authors 
SN  - 9780691150949
PY  - 2010///
CY  -  New Jersey
PB  - Princeton university press 
KW  - Quantum theory
KW  - Astrophysics
KW  - Cosmology
KW  - Space and time
ER  -