Low-lying spectrum of the Y-string three-quark potential using hyper-spherical coordinates V. Dmitrašinović, Toru Sato and Milovan Šuvakov Eur. Phys. J. C, 62 2 (2009) 383-397 Published online: 28 May 2009 DOI: 10.1140/epjc/s10052-009-1050-y