@book { TrendsintheWorldWideMiningIndustry,
    title = "Trends in the World-Wide Mining Industry",
    author = "Peter {Kausch} and Michael {Nippa}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095617"
}