Nonlinear wave trains in three-strand α-helical protein models C.B. Tabi, J.C. Mimshe Fewu, H.P. Ekobena Fouda, A. Mohamadou and T. C Kofané Eur. Phys. J. B, 86 9 (2013) 374 Published online: 09 September 2013 DOI: 10.1140/epjb/e2013-40467-6