Correlation evolution and monogamy of two geometric quantum discords in multipartite systems Yan-Kui Bai, Ting-Ting Zhang, Li-Tao Wang and Z. D. Wang Eur. Phys. J. D, 68 10 (2014) 274 Published online: 01 October 2014 DOI: 10.1140/epjd/e2014-50387-8