Flare-out conditions in static thin-shell wormholes
  We reconsider the generalized flare-out conditions in static wormhole throats given by Hochberg and Visser. We show that due to the presence of matter sources on the throat, these conditions are not applicable to the thin-shell wormholes. 
S. Habib Mazharimousavi and M. Halilsoy
gr-qc