@book { MarktentwicklungdurchVoucher,
    title = "Marktentwicklung durch Voucher?",
    subtitle = "Eine institutionen-ökonomische Analyse des «Microenterprise Training Voucher Scheme» in Paraguay",
    author = "Philipp {Lepenies}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092594"
}