+@Article{knippenberg63,
+ author = "W. F. Knippenberg",
+ year = "1963",
+ journal = "Philips Res. Repts.",
+ volume = "18",
+ pages = "161",
+ notes = "acheson process",
+}
+
+@Article{hoffmann82,
+ author = "L. Hoffmann and G. Ziegler and D. Theis and C.
+ Weyrich",
+ collaboration = "",
+ title = "Silicon carbide blue light emitting diodes with
+ improved external quantum efficiency",
+ publisher = "AIP",
+ year = "1982",
+ journal = "Journal of Applied Physics",
+ volume = "53",
+ number = "10",
+ pages = "6962--6967",
+ keywords = "light emitting diodes; silicon carbides; quantum
+ efficiency; visible radiation; experimental data;
+ epitaxy; fabrication; medium temperature; layers;
+ aluminium; nitrogen; substrates; pn junctions;
+ electroluminescence; spectra; current density;
+ optimization",
+ URL = "http://link.aip.org/link/?JAP/53/6962/1",
+ doi = "10.1063/1.330041",
+}
+