String theory and M-theory : a modern introduction / Katrin Becker, Melanie Becker, and John H. Schwarz. Becker, Katrin, 1967- Becker, Melanie. Schwarz, John H. String models. String models Problems, exercises, etc. QC794.6.S85 B435 2007 530.1 22 BES Includes bibliographical references (p. 700-725) and index. Cambridge ; New York : Cambridge University Press, c2007. c2007. 2007 Text xvi, 739 p. : http://www.loc.gov/catdir/enhancements/fy0710/2007296021-d.html http://www.loc.gov/catdir/enhancements/fy0710/2007296021-t.html http://www.loc.gov/catdir/enhancements/fy0733/2007296021-b.html eng