ON QUANTUM METHODS IN THE REPRESENTATION-THEORY OF REDUCTIVE LIE-ALGEBRAS Article ZHELOBENKO D.P. Functional Analysis and its Applications. Vol. 28. 1994. P. 114-116
ANHARMONIC EFFECTS IN THE FIBONACCI-CHAIN QUASI-CRYSTALS Article ZUBOV V.I., RABELO J.NT. Physical Review B. Vol. 49. 1994. P. 8671-8678