%0 Journal Article %A Georges Jobert %T Kelvin's article on the magnetic centre and Schmidt's one on the optimal eccentric dipole, revisited %J Comptes Rendus. GĂ©oscience %D 2015 %P 64-65 %V 347 %N 2 %I Elsevier %R 10.1016/j.crte.2015.06.004 %G en %F CRGEOS_2015__347_2_64_0