1
Έκδοση 1991
Full text available from ABI/INFORM Global: 01/01/1996 to 12/31/2019
Full text available from Healthcare Administration Database: 01/01/1996 to 12/31/2019
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
3
Full text available from ABI/INFORM Trade & Industry: 01/01/2011 to 10/31/2012
Full text available from Research Library: 01/01/2011 to 10/31/2012
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
4
Full text available from ABI/INFORM Global: 04/01/2010 to present
Full text available from East Europe, Central Europe Database: 04/01/2010 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό