@book { MilanRastislavtefnikandThoseWhoFollowedHim,
    title = "Milan Rastislav Štefánik and Those Who Followed Him",
    author = "Slavomír {Michálek}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16192",
    url = "https://www.peterlang.com/document/1058572"
}