4
Argitaratua 1978
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/2002 to present
Baliabide elektronikoa Aldizkako argitalpena
7
9
Argitaratua 2007
Full text available from Science Database: 01/01/2007 to present
Baliabide elektronikoa Aldizkako argitalpena
14
Full text available from Social Science Database: 01/01/2005 to present
Baliabide elektronikoa Aldizkako argitalpena
18
Full text available from ABI/INFORM Global: 01/01/2012 to present
Baliabide elektronikoa Aldizkako argitalpena