@book { OpeningandExtendingVocationalEducation, title = "Opening and Extending Vocational Education", author = "Philipp {Eigenmann} and Philipp {Gonon} and Markus {Weil}", year = "2021", publisher = "Peter Lang Verlag", address = "Lausanne, Switzerland", doi = "10.3726/b17572", url = "https://www.peterlang.com/document/1057403" }