Kallenbach, A., Fussmann, G., Mayer, H. M., Pitcher, S., & ASDEX Upgrade Team (1994). The influence of spatially and temporally varying edge conditions on the interpretation of spectroscopic flux measurements. Plasma Physics and Controlled Fusion, 36(8), 1299-1306. doi:10.1088/0741-3335/36/8/005.