Optimizing the methodology to measure firmness of grape berries (Vitis vinifera L.) during ripening

1. Fuentes, S.
2. Manso, A.
3. Fenoll, J.
4. Cava, J.
5. Garrido, I.
6. Molina, M.V.
7. Flores, P.
8. Hellin, P.