@book { TheBuyorLeaseDecision,
    title = "The Buy or Lease Decision",
    author = "Michael {Wehrheim}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00879-1",
    url = "https://www.peterlang.com/document/1045675"
}