Media type: E-Article Title: Unitarity constraints on effective interaction in πN scattering Contributor: Luo, Mingxing; Wang, Yong; Zhu, Guohuai imprint: Elsevier BV, 2007 Published in: Physics Letters B Language: English DOI: 10.1016/j.physletb.2007.03.052 ISSN: 0370-2693 Keywords: Nuclear and High Energy Physics Origination: Footnote: