1
Full text available from Environmental Science Database: 01/01/2008 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
2
Έκδοση 2012
Full text available from ABI/INFORM Global: 04/01/2015 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό
3
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/2002 to present
Full text available from East Europe, Central Europe Database: 01/01/2002 to present
Full text available from Environmental Science Database: 01/01/2002 to present
Ηλεκτρονική πηγή Επιστημονικό περιοδικό