How different can h-cobordant manifolds be?
  We study the homeomorphism types of manifolds h-cobordant to a fixed one. Our investigation is partly motivated by the notion of special manifolds introduced by Milnor in his study of lens spaces. In particular we revisit and clarify some of the claims concerning h-cobordisms of these manifolds. 
Bj{\o}rn Jahren and Slawomir Kwasik
math.GT