Comparison theorems for ultrahyperbolic equations.
Travis, C.C. ; Young, E.C.
International Journal of Mathematics and Mathematical Sciences, Tome 1 (1978), p. 31-40 / Harvested from The Electronic Library of Mathematics
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Publié le : 1978-01-01
DOI : https://doi.org/10.1155/S0161171278000046
EUDML-ID : urn:eudml:doc:44780 
@article{03597238,
     title = {Comparison theorems for ultrahyperbolic equations.},
     journal = {International Journal of Mathematics and Mathematical Sciences},
     volume = {1},
     year = {1978},
     pages = {31-40},
     doi = {10.1155/S0161171278000046},
     zbl = {0384.35005},
     language = {en},
     url = {http://dml.mathdoc.fr/item/03597238}
}

Travis, C.C.; Young, E.C. Comparison theorems for ultrahyperbolic equations.. International Journal of Mathematics and Mathematical Sciences, Tome 1 (1978) pp. 31-40. doi : 10.1155/S0161171278000046. http://gdmltest.u-ga.fr/item/03597238/