%0 Journal Article %A J. Gibbon %T Orthonormal quaternion frames, Lagrangian evolution equations, and the three-dimensional Euler equations %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2007 %P 535-560 %V 62 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_2007_62_3_a6/ %G en %F RM_2007_62_3_a6