* D. A. Varshalovich, A. N. Moskalev, V. K. Khersonskii "Quantum Theory of Angular Momentum",(1988) World Scientific Publishing Co., Singapore, ISBN 9971-5-0107-4
* D. A. Varshalovich, A. N. Moskalev, V. K. Khersonskii "Quantum Theory of Angular Momentum",(1988) World Scientific Publishing Co., Singapore, ISBN 9971-5-0107-4