@article{article0b73cc5c, title = {Optical and x-ray diffraction studies on the incorporation of carbon as a dopant in cubic GaN}, author = {Fernandez, J R L and Cerdeira, F and Meneses, E A and Brasil, M J S P and Soares, J A N and Santos, A M and Noriega, O C and Leite, J. R. and As, D J and Köhler, U and Potthast, S and Pacheco Salazar, D G}, year = {2003}, doi = {10.1103/physrevb.68.155204}, journal = {Physical Review B} }