J.Y. Zubarev, S.-H. Chang, C. Lin, N.A. Boldyrev*, A.V. Pavlenko, A.V. Nazarenko, A.V. Nagaenko, Y.I. Yurasov, I.A. Verbenko, I.A. Parinov, L.A. Reznichenko (2020)/Phase States, Microstructure And Dielectric Characteristics Of Solid Solutions (1 – x)NaNbO3 – xCa2Nb2O7 AND (1 – x)NaNbO3 – xSr2Nb2O7