@article{04148882, title = {Operational calculus and differential equations with infinitely smooth coefficients.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {13}, year = {1990}, pages = {405-410}, doi = {10.1155/S0161171290000618}, zbl = {0701.44006}, language = {en}, url = {http://dml.mathdoc.fr/item/04148882} }
Nemzer, Dennis. Operational calculus and differential equations with infinitely smooth coefficients.. International Journal of Mathematics and Mathematical Sciences, Tome 13 (1990) pp. 405-410. doi : 10.1155/S0161171290000618. http://gdmltest.u-ga.fr/item/04148882/