N -wave equations with orthogonal algebras: ℤ 2 and ℤ 2 × ℤ 2 reductions and soliton solutions. Gerdjikov, Vladimir S., Kostov, Nikolay A., Valchev, Tihomir I. (2007) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Noncommutative root space Witt, Ricci flow, and Poisson bracket continual Lie algebras. Zuevsky, Alexander (2009) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]