@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/