Metoda orbit

1. B. Kostant: Quantization and unitary representations, in Lectures in Modern Analysis III, C. T. Taam (ed.), Lecture Notes in Mathematics 170, pp. 87-208,Springer-Verlag, Berlin, 1970.
2. A. A. Kirillov: Elementy Teorii Predstavlenij, Nauka, 1978. anglická verze: Elements of the Theory of Representations, Springer-Verlag, New York, 1976.