Kozak, L.; Silva Souza, J.; Nawrot, A.; Proch, J.; Kaźmierski, M.; Zawieja, A.; Niedzielski, P. Handheld ED-XRF Spectrometers in Geochemical Investigation: Comparative Studies for Glacial Deposits from Spitsbergen. PPRes 2021, 42, 163–172.