1
Full text available from ABI/INFORM Global: 07/01/2007 to 08/31/2011
Full text available from Canadian Business & Current Affairs Database: 07/01/2007 to 08/31/2011
Full text available from Engineering Database: 07/01/2007 to 08/31/2011
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
2
Full text available from ABI/INFORM Global: 10/01/2011 to present
Full text available from Canadian Business & Current Affairs Database: 10/01/2011 to present
Full text available from Engineering Database: 10/01/2011 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό