ering, "A Note on Angular lvlomentum Commutators in Light-Cone Formulation of Open Bosonic String Theory," arXiv:1104.4446 [hep-th]. [9] A. Beylin, T. L. Curtright, E. Ivanov, L. Mezincescu and P. K. Townsend, "Unitary Spherical Super-Landau Models," JHEP 0810, 069 (2008). [arXiv:0806.4716 [hep-th]]. [10] A. B