@unpublished{Pikovskij2015,
  author    = {Pikovskij, Arkadij},
  title     = {Comment on "Asymptotic Phase for Stochastic Oscillators"},
  series = {Physical review letters},
  volume    = {115},
  journal   = {Physical review letters},
  number    = {6},
  publisher = {American Physical Society},
  address   = {College Park},
  issn      = {0031-9007},
  doi       = {10.1103/PhysRevLett.115.069401},
  pages     = {1},
  year      = {2015},
  language  = {en}
}