@book { PflanzenvermehrendurchStecklinge,
    title = "Pflanzen vermehren durch Stecklinge ",
    author = "Simone {Effenberk}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638548892",
    url = "https://www.hausarbeiten.de/document/61428"
}