@incollection{dSW18pontryaginspaces,
  title={Compressed resolvents, {$Q$}-functions and {$h_0$}-resolvents in almost pontryagin spaces},
  author={de Snoo, Henk and Woracek, Harald},
  booktitle={Indefinite Inner Product Spaces, Schur Analysis, and Differential Equations},
  pages={425--484},
  year={2018},
  publisher={Springer}, 
  doi = {10.1007/978-3-319-68849-7_18},
  biburl = {http://samuel-mohr.de/files/bib/wien.bib},
  abstract = {The interest of this paper lies in the selfadjoint extensions of a symmetric relation in an almost Pontryagin space. More in particular, in their compressed resolvents, {$Q$}-functions and {$h_0$}-resolvents. We give a systematic approach to each of this three topics, and show an intimate connection between the last two.},
  note = {During an Erasmus exchange stay at Vienna University of Technology for six months in 2015, I worked
on a joint project titled ``Operator theory in indefinite inner product space'' with the ``Research Group for
Functional Analysis'' of Professor Harald Woracek; results can be found here. }
}

@incollection{dSW18pontryaginspaces_withoutnote,
  title={Compressed resolvents, {$Q$}-functions and {$h_0$}-resolvents in almost pontryagin spaces},
  author={de Snoo, Henk and Woracek, Harald},
  booktitle={Indefinite Inner Product Spaces, Schur Analysis, and Differential Equations},
  pages={425--484},
  year={2018},
  publisher={Springer}, 
  doi = {10.1007/978-3-319-68849-7_18},
  biburl = {http://samuel-mohr.de/files/bib/wien.bib},
  abstract = {The interest of this paper lies in the selfadjoint extensions of a symmetric relation in an almost Pontryagin space. More in particular, in their compressed resolvents, {$Q$}-functions and {$h_0$}-resolvents. We give a systematic approach to each of this three topics, and show an intimate connection between the last two.},
}