@book { AnsatzzurrationalenPlanungunseresLebensraumes,
    title = "Ansatz zur rationalen Planung unseres Lebensraumes",
    author = "Peter {Ruckstuhl}",
    year = "1977",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069963"
}