Physical properties of liquid eutectic ionic systems NaF−LaF3 and NaF−NdF3 - L. A. Bulavin; A. A. Omelchuk; N. V. Faidiuk; V. M. Skliarchuk; Yu. O. Plevachuk; V. S. Kopan; R. N. Savchuk (Ukrainian Journal of Physics, 2014)