Multivariate statistical analysis of mass spectra as a tool for the classification of the main humic substances according to their structural and conformational features

1. Baigorri, R.
2. Zamarreño, A.M.
3. Fuentes, M.
4. González-Gaitano, G.
5. García-Mina, J.M.
6. Almendros, G.
7. González-Vila, F.J.