Praktiki Arithmitiki vivlion periechon theoria ke plistas lelimenas ke alitous askisis, aparetiton di' olous tous mathitas ke idia dia tous ipopsifious pros simmetochin is diagonismous Trapezon, pedagogikon akadimion, dimosion ipiresion i diaforon Scholon opou zitite pros exetasin ke to mathima tis arithmitikis[1955, 2nd edition]