Sanna Kaasalainen, Antero Kukko, Tomi Lindroos, Paula Litkey, Harri Kaartinen, Juha Hyyppä, Eero Ahokas. Brightness Measurements and Calibration With Airborne and Terrestrial Laser Scanners. IEEE T. Geoscience and Remote Sensing, 46(2):528-534, 2008. [doi]
Abstract is missing.