@incollection{Berry:1980:SGA,
author = {Berry, M. V.},
title = {Some Geometric Aspects of Wave Motion: Wavefront Dislocations,
Diffraction Catastrophes, Diffractals},
booktitle = {Geometry of the Laplace Operator (Proc. Sympos. Pure Math.,
Univ. Hawaii, Honolulu, Hawaii, 1979)},
volume = {36},
pages = {13–28},
publisher = {Amer. Math. Soc.},
address = {Providence, R.I.},
year = {1980},
mrclass = {58C28 (78A45)},
mrnumber = {MR0573427 (81f:58012)},
mrreviewer = {I. Stewart},
zblno = {0437.73014}}