Bargheer, T.; Caetano, J.; Fleury, T.; Komatsu, S.; Vieira, P. : Handling Handles: Nonplanar Integrability in N = 4 Supersymmetric Yang-Mills Theory. In: Physical Review Letters 121 (2018), Nr. 23, 231602. DOI:
https://doi.org/10.1103/PhysRevLett.121.231602