“Studies on the Hydrodynamics of Fluidized Layers I. Measuring Methods for the Determination of the Expansion of Fluidized Layers”. Hungarian Journal of Industry and Chemistry 1, no. 1 (February 2, 1973): 31–52. Accessed April 13, 2025. https://hjic.mk.uni-pannon.hu/index.php/hjic/article/view/520.