1. Becker, K., Becker, M., Schwarz, J.: String theory and M-theory: a modern introduction. Cambridge University Press, Cambridge (2007)
2. Polchinski, J.: String theory. Vol. 1: an introduction to the bosonic string. Cambridge Monographs on Mathematical Physics, Cambridge University Press (2007)
3. Polchinski, J.: String theory. Vol. 2: superstring theory and beyond. Cambridge Monographs on Mathematical Physics, Cambridge University Press (2007)
4. Veneziano, G.: An introduction to dual models of strong interactions and their physical motivations. Phys. Rep. 9, 199–242 (1974)
5. Green, M.B., Schwarz, J.H., Witten, E.: Superstring theory. Vol. 1: introduction. Cambridge Monographs on Mathematical Physics (1988)