Petukhova, G. A., and T. A. Kulkova. “Prospects for the Use of Shungite As a Formaldehyde Sorbent in Composite Materials”. Sorbtsionnye I Khromatograficheskie Protsessy, Vol. 21, no. 1, Feb. 2021, pp. 100-1, doi:10.17308/sorpchrom.2021.21/3225.