Real Hamiltonian forms of affine Toda models related to exceptional Lie algebras. Gerdjikov, Vladimir S.; Grahovski, Georgi G. — 2006 SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Multi-component NLS models on symmetric spaces: spectral properties versus representations theory. Gerdjikov, Vladimir S.; Grahovski, Georgi G. — 2010 SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]