@book { HappeninginEducationAnEmpiricalStudy,
    title = "Happening in Education – An Empirical Study",
    author = "Martin {Blaszk}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18401",
    url = "https://www.peterlang.com/document/1061445"
}