Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) J. W. Craggs,The breakdown of the hodograph transformation for irrotational compressible fluid flow in two dimensions,Mathematical Proceedings of the Cambridge Philosophical Society,0305-0041,Cambridge University Press (CUP),1948-07,44,3,360-379,https://cir.nii.ac.jp/crid/1361137046101162496,https://doi.org/10.1017/s0305004100024373