@book { ThoughtandLogic,
    title = "Thought and Logic",
    subtitle = "The Debates between German-Speaking Philosophers and Symbolic Logicians at the Turn of the 20 th  Century",
    author = "Jarmo {Pulkkinen}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099627"
}