J. Balles, R. Reiners, D. Spiehl, E. Dörsam, and A. Blaeser, “Development and validation of a 3D-printed spectral verification system for colorimetric-based biosensors: DOI 10.14622/JPMTR-2006”, J. Print Media Technol. Res., vol. 9, no. 4, pp. 207–216, Dec. 2020.