P. N. Gavryushkin, N. S. Martirosyan, S. V. Rashchenko, D. N. Sagatova, N. E. Sagatov, A. I. Semerikova, T. M. Fedotenko, K. D. Litasov, “First experimental synthesis of mg orthocarbonate by the MgCO$_3$ + MgO = Mg$_2$CO$_4$ reaction at pressures of the Earth's lower mantle”, Pis'ma v Zh. Èksper. Teoret. Fiz., 116:7 (2022), 472–480; JETP Letters, 116:7 (2022), 477–484
