@masterthesis{2916861,
    title = "Splitting Theorems for Semi-Riemannian Manifolds",
    authorField = "Ντούλιος, Γεώργιος",
    year = "2020",
    school = "ΠΜΣ Μαθηματικά, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών"
}