Zotyev, D.V., A.G. Yagola, and M.N. Filippov. 2003. “On One Inverse Problem of Quantitative Electron Probe Microanalysis”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie) 4 (4):26-32. https://en.num-meth.ru/index.php/journal/article/view/73.