@book { DigitalLearningLives,
    title = "Digital Learning Lives",
    author = "Ola {Erstad}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/978-1-4539-1019-1",
    url = "https://www.peterlang.com/document/1051012"
}