Joseph Yahalom, "Hebrew mystical poetry and its Turkish background," in Andreas Tietze and Joseph Yahalom, Ottoman Melodies Hebrew Hymns: a 16th century cross-cultural adventure (Budapest: Akadémiai Kiadó, 1995), pp.
Lovász, M.D. Plummer: Matching Theory, Akadémiai Kiadó - North Holland, Budapest, 1986