@Article{ 
  KovPan19,
  author = { Kovarik, Hynek and Pankrashkin, Konstantin },
  title = { Robin eigenvalues on domains with peaks },
  journal = { J. Differential Equations },
  year = { 2019 },
  doi = { 10.1016/j.jde.2019.02.016 },
  volume = { 267 },
  pages = { 1600-1630 },
  URL = { http://cvgmt.sns.it/paper/5090/ },
  note = { cvgmt preprint}
}