@book { HandbookforForeignLanguageLearninginOnlineTandemsandEducationalSettings,
    title = "Handbook for Foreign Language Learning in Online Tandems and Educational Settings",
    author = "Hermann {Funk} and Manja {Gerlach} and Dorothea {Spaniel-Weise}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b10732",
    url = "https://www.peterlang.com/document/1054898"
}