1. Stepanov, S.I. and Chekmarev, A.M., Dokl. Chem., 2008, vol. 423, part. 1, pp. 276–278.
2. Stepanov, S.I., Boyarintsev, A.V., and Chekmarev, A.M., Dokl. Chem., 2009, vol. 427, part 2, pp. 202–206.
3. Boyarintsev, A.V., Stepanov, S.I., and Chekmarev, A.M., Abstracts of Papers, VIRossiiskaya konferentsiya po radiokhimii. Radiokhimiya-2009 (VI Russian Conference on Radiochemistry, Radiochemistry-2009, Moscow, 2009), Ozersk: PO “Mayak,” 2009, pp. 126–127.
4. Soedineniya redkozemel’nykh elementov. Karbonaty, oksalaty, nitraty, titanaty (Rare Earth Compounds. Carbonates, Oxalate, Nitrates, Titanates), Orlovskii, V.P. and Chudinov, N.N., Eds., Moscow Nauka, 1984.
5. Queiroz, C.A. da S., de Vasconcellos, M.E., da Rocha, S.M.R., Seneda, J.A., Pedreira, W.R., Matos, J. do R., and Abrão, A., J. Alloys Comp., 2004, vol. 374, pp. 401–404.