@phdthesis{TUW-101180, author = {Brech, Helmut}, title = {{O}ptimization of {G}a{A}s {B}ased {H}igh {E}lectron {M}obility {T}ransistors by {N}umerical {S}imulation}, school = {{I}nstitut f{\"u}r {M}ikroelektronik}, year = {1998}, url = {http://www.iue.tuwien.ac.at/phd/brech} }