Inexistence of permafrost at the top of the Veleta peak (Sierra Nevada, Spain)

1. Oliva, M.
2. Gómez-Ortiz, A.
3. Salvador-Franch, F.
4. Salvà-Catarineu, M.
5. Palacios, D.
6. Tanarro, L.
7. Ramos, M.
8. Pereira, P.
9. Ruiz-Fernández, J.