@book { eLearningbeginnen,
    title = "eLearning beginnen",
    author = "Maria {Mesner} and Michaela {Rieder} and Charlotte {Zwiauer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101051"
}