Consistent off-shell $\pi N N$ vertex and nucleon self-energy
  We present a consistent calculation of half-off-shell form factors in the pion-nucleon vertex and the nucleon self-energy. Numerical results are presented. Near the on-shell point the pion-nucleon vertex is dominated by the pseudovector coupling, while at large nucleon invariant masses we find a sizable pseudoscalar admixture. 
S. Kondratyuk, O. Scholten (Kernfysisch Versneller Instituut,   Groningen, The Netherlands)