Delcourt, Bernard A.2006-12-282006-12-2819801980http://hdl.handle.net/2440/20740Typescript (photocopy)v, 131 leaves, [1] leaf of plates : ill. ; 30 cm.129868 bytesapplication/pdfenThe large scale structure in two-dimensional vorticity layers and the centre-to-centre point-vortex approximationThesis