@article{00011596, title = {Boundary value problems for partial differential equations with piecewise constant delay.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {14}, year = {1991}, pages = {363-380}, doi = {10.1155/S0161171291000431}, zbl = {0749.35061}, language = {en}, url = {http://dml.mathdoc.fr/item/00011596} }
Wiener, Joseph. Boundary value problems for partial differential equations with piecewise constant delay.. International Journal of Mathematics and Mathematical Sciences, Tome 14 (1991) pp. 363-380. doi : 10.1155/S0161171291000431. http://gdmltest.u-ga.fr/item/00011596/