Two charged strangeonium-like structures observable in the Y(2175)→ϕ(1020)π + π − process Dian-Yong Chen, Xiang Liu and Takayuki Matsuki Eur. Phys. J. C, 72 5 (2012) 2008 Published online: 15 May 2012 DOI: 10.1140/epjc/s10052-012-2008-z