@phdthesis{Gierens2026,
  author      = {Fabian Gierens},
  title       = {Irreversible Investment Problems with Unknown and Time-Varying Profitability},
  type        = {doctoralthesis},
  pages       = {VIII, 143},
  school      = {Universit{\"a}t Trier},
  year        = {2026},
}