@masterthesis{2897019,
    title = "Topics of the Calculus of Variations",
    authorField = "Αθανασάκος, Βασίλειος",
    year = "2020",
    school = "ΠΜΣ Μαθηματικά, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών"
}