Extension theory and Kreĭn-type resolvent formulas for nonsmooth boundary value problems

@article{Abels2010ExtensionTA,
  title={Extension theory and Kreĭn-type resolvent formulas for nonsmooth boundary value problems},
  author={Helmut Abels and Gerd Grubb and Ian Wood},
  journal={Journal of Functional Analysis},
  year={2010},
  volume={266},
  pages={4037-4100}
}
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