Positive parity scalar mesons in the 1–2 GeV mass range L. Maiani, F. Piccinini, A.D. Polosa and V. Riquer Eur. Phys. J. C, 50 3 (2007) 609-616 Published online: 07 February 2007 DOI: 10.1140/epjc/s10052-007-0219-5