@book { Elproblemaontolgicodelospersonajes,
    title = "El problema ontológico de los personajes",
    subtitle = "Estudio de la narrativa breve de Miguel de Unamuno",
    author = "Katarzyna {Parys}",
    year = "2023",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b20966",
    url = "https://www.peterlang.com/document/1382156"
}