@book { CALLforOpenness,
    title = "CALL for Openness",
    author = "Mariusz {Marczak} and Jarosław {Krajka}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06756-9",
    url = "https://www.peterlang.com/document/1050126"
}