Exact solutions for equations of Bose-Fermi mixtures in one-dimensional optical lattice. Kostov, Nikolay A.; Gerdjikov, Vladimir S.; Valchev, Tihomir I. — 2007 SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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]