@book { SpectrumofEmotions,
    title = "Spectrum of Emotions",
    author = "Wojciech {Drąg} and Ewa {Kębłowska-Ławniczak}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05341-8",
    url = "https://www.peterlang.com/document/1049026"
}