@book{9702,
	author = {Γκατζούλης, Κώστας and Ρίζος, Γιώργος Ι.},
	title = {Μαθηματικά :},
	publisher = {Γκατζούλης, },
	year = {[χ.χ.].},
	address = {Θεσσαλονίκη : }
}