1. ISO 19232-5-2013 Non destructive testing - image quality of radiographs - Part 2. Deterioration of the image unsharpness using duplex wire -type image quality indicators.
2. ISO 1821-1.2017 Non-destructive testing - infrared thermography - Part 1 Characteristics of system equipment.
3. H. Budzier and G. Gerlach, Thermal Infrared Sensors: Theory, Optimization and practice (John Willey & Sons Ltd., 2011).
4. A.R. Jha, Infrared technology: Applications to electro-Optics, photonic Devices and and Sensors (Willey Interscience: 1-st edition, 2000), p. 400.
5. ISO 12653-1:2000, Electronic imaging - Test target for the black-and-white scanning of office documents. Part 1: Characteristics.