- Kasatkin A V, Zubkova N V, Pekov I V, Chukanov N V, Škoda R, Agakhanov A A, Belakovskiy D I, Britvin S N, Pushcharovsky D Y (2021) The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part IV. Alexkuznetsovite-(La), La2Mn(CO3)(Si2O7), alexkuznetsovite-(Ce), Ce2Mn(CO3)(Si2O7) and biraite-(La), La2Fe2+(CO3)(Si2O7), three new isostructural minerals and a definition of the biraite group. Mineralogical Magazine 85, 772-783