Ultarakova, A., Z. Karshyga, N. Lokhova, A. Yessengaziyev, and P. Burns. “Studies for Hydrometallurgical Processing of Titanium-Magnesium Production Sludge With Niobium Extraction in Solution”. Kompleksnoe Ispolzovanie Mineralnogo Syra = Complex Use of Mineral Resources, vol. 325, no. 2, Oct. 2022, pp. 53-61, doi:10.31643/2023/6445.18.