@book { FriedrichAlbertLangealsPsychologeundPhilosoph,
    title = "Friedrich Albert Lange als Psychologe und Philosoph",
    author = "Herta {Mayerhofer} and Erich {Vanecek}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101800"
}