Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
Ishikawa G.,Perturbations of Caustics and fronts,Hokkaido University Preprint Series in Mathematics,,"Department of Mathematics, Hokkaido University",2002-10,566,,1-17,https://cir.nii.ac.jp/crid/1390290699771972352,https://doi.org/10.14943/83711