Almost Hypercomplex Manifolds with Hermitian-Norden Metrics and 4-Dimentional Indecomposable Real lie algebras depending on Two Parameters

Manev, H. (). Almost Hypercomplex Manifolds with Hermitian-Norden Metrics and 4-Dimentional Indecomposable Real lie algebras depending on Two Parameters. Доклади на Българската академия на науките; Доклади на Българската академия на науките.