@book { EducationalandTechnologicalApproachestoRenewableEnergy,
    title = "Educational and Technological Approaches to Renewable Energy",
    author = "Walter {Leal Filho} and Julia {Gottwald}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01471-6",
    url = "https://www.peterlang.com/document/1129789"
}