@book { 50YearsofLanguageExperimentswithGreatApes,
    title = "50 Years of Language Experiments with Great Apes",
    author = "Igor {Hanzel}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b11008",
    url = "https://www.peterlang.com/document/1055322"
}