1. Nekrasov, N.: Magnificent four.
arXiv:1712.08128
2. Witten, E.: BPS Bound states of D0–D6 and D0–D8 systems in a
$$B$$
B
-field. JHEP 04, 012 (2002).
arXiv:hep-th/0012054
3. Nekrasov, N.: A la recherche de la M-theorie perdue Z theory: Chasing M/f theory. In: Annual International Conference on Strings, Theory and Applications (Strings 2004) Paris, France, 28 June–July 2, 2004 (2004).
arXiv:hep-th/0412021
4. Nekrasov, N.: Z-theory: chasing M/F-theory. C. R. Phys. 6, 261–269 (2005)
5. Nekrasov, N., Okounkov, A.: Membranes and sheaves.
arXiv:1404.2323