@article{1102978706,
author = {Nur, Hussain S.},
title = {Singular perturbation of linear partial differential equation with constant coefficients.},
journal = {Pacific J. Math.},
volume = {31},
number = {3},
year = {1969},
pages = { 187-199},
language = {en},
url = {http://dml.mathdoc.fr/item/1102978706}
}
Nur, Hussain S. Singular perturbation of linear partial differential equation with constant coefficients.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 187-199. http://gdmltest.u-ga.fr/item/1102978706/