Bolshukhin, D., Neu, R., Schlögl, D., Dux, R., & ASDEX Upgrade Team (2001). Measurement of Spurious Impurity Concentrations in ASDEX Upgrade by X-Ray Spectroscopy. Review of Scientific Instruments, 72(11), 4115-4124. Retrieved from http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=RSINAK000072000011004115000001&idtype=cvips&gifs=Yes.