Gloi, A. M. “Experimental Characterization of Ionization Chamber Stem Effects in Low-Density Media for Flattened and Flattening-Filter-Free Photon Beams”. International Journal of Research in Medical Sciences, vol. 14, no. 9, Aug. 2026, pp. 3740-4, doi:10.18203/2320-6012.ijrms20263082.