2
Argitaratua 1999
Full text available from Social Science Database: 01/01/1996 to present
Baliabide elektronikoa Aldizkaria
3
Argitaratua 2005
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/2005 to present
Baliabide elektronikoa Aldizkaria
6
Available in Fuente Académica Plus.
Baliabide elektronikoa Aldizkaria