Gurgul, D., A. Burbelko, and Tomasz Wiktor. “Derivation of Equations for a Size Distribution of Spherical Particles in Non-Transparent Materials”. Journal of Casting &Amp; Materials Engineering, vol. 5, no. 4, Sept. 2021, pp. 53-60, doi:10.7494/jcme.2021.5.4.53.