1. Green M.B., Schwarz J.H., Witten E., Cambridge Monographs on Mathematical Physics, Cambridge University Press, Cambridge, 1987; Green M.B., Schwarz J.H., Witten E., Cambridge Monographs on Mathematical Physics, Cambridge University Press, Cambridge, 1987; Polchinski J., Cambridge University Press, Cambridge, 1998; Polchinski J., Cambridge University Press, Cambridge, 1998; Blumenhagen R., Lüst D., Theisen S., Springer, 2013.
2. Gross D.J., Harvey J.A., Martinec E.J., Rohm R., Nuclear Phys. B256 (1985) 253; Gross D.J., Harvey J.A., Martinec E.J., Rohm R., Phys. Rev. Lett. 54 (1985) 502.
3. Forgács P., Manton N.S., Comm. Math. Phys. 72 (1980) 15–35.
4. Kapetanakis D., Zoupanos G., Phys. Rep. 219 (1992).
5. Kubyshin Yu.A., Mourão J.M., Rudolph G., Volobujev I.P., Lecture Notes in Physics, Vol. 349, Springer-Verlag, Berlin, 1989.