Strings and gravity : tying the forces together : proceedings of the Fifth Francqui Colloquium, 19-21 October 2001, Brussels /
Francqui Colloquium(5th :2001 :Brussels, Belgium)
Henneaux, Marc.
Sevrin, A.(Alexander)
Bruxelles : De Boeck & Larcier,
c2003.
Includes bibliographical references.
String models