1
Full text available from PRISMA Database with HAPI Index: 04/01/2011 to present
Full text available from Research Library: 04/01/2011 to present
Full text available from PRISMA Database with HAPI Index: 04/01/2014 to 04/30/2017
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
2
Έκδοση 1996
Full text available from ABI/INFORM Global: 01/05/1998 to 05/31/2000
Ηλεκτρονική πηγή Εφημερίδα