Quantum algebra in mixed light pseudoscalar meson states Li-Jun Tian, Yan-Ling Jin, Ying Jiang and Li-Guo Qin Eur. Phys. J. C, 71 1 (2011) 1528 Published online: 06 January 2011 DOI: 10.1140/epjc/s10052-010-1528-7