@book { ValidityIssuesinQuantitativeMigrantHealthResearch,
    title = "Validity Issues in Quantitative Migrant Health Research",
    author = "Patrick {Brzoska} and Oliver {Razum}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1136174"
}