00330nam a2200121Ia 4500082001800000100001800018245004200036260004800078300001000126490006200136500000500198700000500203  a516bAr759.ST  aArnold, V. I.  aSingularity theory; selected papersb  aCambridgebCambridge University Pressc1981  a266p.  aLondon Mathematical Society, lecture note seriesv no. 53  a  a