Successive toroidal compactifications of a closed bosonic string are studied and some Lie groups solutions are derived.
MEBARKI, N.; TALEB, A.; AISSAOUI, H.; BELALOUI, NADIR; and HAOUCHINE, M. (2001) "Successive Toroidal Compactifications of a Closed Bosonic Strings," Turkish Journal of Physics: Vol. 25: No. 2, Article 1. Available at: https://journals.tubitak.gov.tr/physics/vol25/iss2/1