Khomenko, Oleksandr Max Planck Institute for Mathematics, Max Planck Society;
Mazorchuk, Volodymyr Max Planck Institute for Mathematics, Max Planck Society;
Khomenko, O., & Mazorchuk, V. (2002). Rigidity of generalized Verma modules. Colloquium Mathematicum, 92(1), 45-57.