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\bibitem{Bougrioua_etal1999} {\textquotedblleft}\textit{Mobility collapse in undoped and Si-doped GaN grown by LP-MOVPE}{\textquotedblright}. Bougrioua Z, Farvacque J-L, Moerman I, Demeester P, Harris JJ, Lee K, Van Tendeloo G, Lebedev O, Trush EJ, Physica status solidi: B: basic research \textbf{216}, 571 (1999).   http://doi.org/10.1002/(SICI)1521-3951(199911)216:1<571::AID-PSSB571>3.0.CO;2-K

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