@article{TUW-107793, author = {Ringhofer, Ch. and Nedjalkov, Mihail and Kosina, Hans and Selberherr, Siegfried}, title = {{S}emiclassical {A}pproximation of {E}lectron-{P}honon {S}cattering {B}eyond {F}ermi's {G}olden {R}ule}, journal = {{S}{I}{A}{M} {J}ournal on {A}pplied {M}athematics}, year = {2004}, volume = {64}, number = {6}, pages = {1933--1953}, url = {http://www.iue.tuwien.ac.at/pdf/ib_2005/JB2004_Ringhofer_1.pdf}, doi = {10.1137/S0036139903428914} }