@masterthesis{1916000,
    title = "Heteroclinic, Homoclinic and Periodic Orbits in Hamiltonian systems for critical values of energy",
    authorField = "Αλεξανδράκης, Νικόλαος",
    year = "2017",
    school = "ΠΜΣ Μαθηματικά, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών"
}