Space-time caustics.
Gorman, Arthur D.
International Journal of Mathematics and Mathematical Sciences, Tome 9 (1986), p. 531-540 / Harvested from The Electronic Library of Mathematics
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Publié le : 1986-01-01
DOI : https://doi.org/10.1155/S0161171286000662
EUDML-ID : urn:eudml:doc:46149 
@article{03991965,
     title = {Space-time caustics.},
     journal = {International Journal of Mathematics and Mathematical Sciences},
     volume = {9},
     year = {1986},
     pages = {531-540},
     doi = {10.1155/S0161171286000662},
     zbl = {0613.34046},
     language = {en},
     url = {http://dml.mathdoc.fr/item/03991965}
}

Gorman, Arthur D. Space-time caustics.. International Journal of Mathematics and Mathematical Sciences, Tome 9 (1986) pp. 531-540. doi : 10.1155/S0161171286000662. http://gdmltest.u-ga.fr/item/03991965/