TY - JOUR A1 - Ghil, M. T1 - Hilbert problems for the geosciences in the 21st century JO - Nonlin. Processes Geophys. J1 - NPG VL - 8 IS - 4/5 SP - 211 EP - 211 Y1 - 2001/10/31 PB - Copernicus Publications SN - 1607-7946 UR - https://npg.copernicus.org/articles/8/211/2001/ L1 - https://npg.copernicus.org/articles/8/211/2001/npg-8-211-2001.pdf DO - 10.5194/npg-8-211-2001 ER -