TY - JOUR A1 - Ohkouchi, N. A1 - Kashiyama, Y. A1 - Kuroda, J. A1 - Ogawa, N O. A1 - Kitazato, H. T1 - The importance of diazotrophic cyanobacteria as primary producers during Cretaceous Oceanic Anoxic Event 2 JO - Biogeosciences J1 - BG VL - 3 IS - 4 SP - 467 EP - 478 Y1 - 2006/10/26 PB - Copernicus Publications SN - 1726-4189 UR - http://www.biogeosciences.net/3/467/2006/ L1 - http://www.biogeosciences.net/3/467/2006/bg-3-467-2006.pdf DO - 10.5194/bg-3-467-2006 ER -