Schweigert, Christoph (2004), Duplij, Steven; Siegel, Warren; Bagger, Jonathan (eds.), "Twisted Sector", Concise Encyclopedia of Supersymmetry: And noncommutative structures in mathematics and physics, Dordrecht: Springer Netherlands, p. 492, doi:10.1007/1-4020-4522-0_665, ISBN 978-1-4020-4522-6, retrieved 2024-11-07 978-1-4020-4522-6