Rogers-Ramanujan identities: A century of progress from mathematics to physics. Berkovich, Alexander, McCoy, Barry M. (1998) Documenta Mathematica
Rotation-invariant operators on white noise functional. Nobuaki Obata (1992) Mathematische Zeitschrift
Rotations in the space of Split octonions. Gogberashvili, Merab (2009) Advances in Mathematical Physics