@book { TheInternationalLegalityofSelfDefenseAgainstNonStateActors,
    title = "The International Legality of Self-Defense Against Non-State Actors",
    author = "Gregor {Wettberg}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103736"
}