TY  - GEN
AU  - Penrose, Roger
TI  - Roger Penrose: collected works. volume 4: 1981-1989
SN  - 9780199219391
U1  - 510 
PY  - 2010///
CY  - Oxford : 
PB  - Oxford University Press
KW  - Mathematics
KW  - Physics
KW  - Philosophy
N1  - Includes bibliographical references
ER  -