Alternate route to soliton solutions in hydrogen-bonded chains
  In this paper we offer an alternate route for investigating soliton solutions in hydrogen-bonded chains. This is done by examining a class of systems of two coupled real scalar fields. We show that this route allows investigating several models for hydrogen-bonded chains in a unified manner. We also show how to investigate interesting issues, in particular the one concerning classical or linear stability of solitonic solutions. 
D. Bazeia, J. R. S. Nascimento, D. Toledo