A simple multi-criteria approach to delimitate nitrate attenuation zones in alluvial floodplains. Four cases in south-western Europe

1. Antiguedad, I.
2. Zabaleta, A.
3. Martinez-Santos, M.
4. Ruiz, E.
5. Uriarte, J.
6. Morales, T.
7. Comin, F.A.
8. Carranza, F.
9. Español, C.
10. Navarro, E.
11. Bodoque, J.M.
12. Ladera, J.
13. Brito, D.
14. Neves, R.
15. Bernard-Jannin, L.
16. Sun, X.
17. Teissier, S.
18. Sauvage, S.
19. Sanchez-Perez, J.-M.