@article{TUW-106790, author = {Markowich, Peter A. and Selberherr, Siegfried}, title = {{A} {S}ingular {P}erturbation {A}nalysis of the {F}undamental {S}emiconductor {D}evice {E}quations - {A}nalysis and {N}umerical {E}xperiments}, journal = {{M}atematica {A}plicada e {C}omputacional}, year = {1984}, volume = {3}, number = {2}, pages = {131--156}, url = {http://www.iue.tuwien.ac.at/pdf/JB1984_Markowich_1.pdf} }