Bard, Edouard; Delaygue, Gilles (2008). "Comment on "Are there connections between the Earth's magnetic field and climate?" by V. Courtillot, Y. Gallet, J.-L. Le Mouël, F. Fluteau, A. Genevey EPSL 253, 328, 2007". Earth and Planetary Science Letters. 265 (1–2): 302–307. Bibcode:2008E&PSL.265..302B. doi:10.1016/j.epsl.2007.09.046.
Bard, Edouard; Delaygue, Gilles (2008). "Comment on "Are there connections between the Earth's magnetic field and climate?" by V. Courtillot, Y. Gallet, J.-L. Le Mouël, F. Fluteau, A. Genevey EPSL 253, 328, 2007". Earth and Planetary Science Letters. 265 (1–2): 302–307. Bibcode:2008E&PSL.265..302B. doi:10.1016/j.epsl.2007.09.046.