STRACH, T., RUF, T., CARDONA, M., JANDL, S., NEKVASIL, Vladimír, CHEN, C., WANKLIYN, B. M., ZHIGUNOV, D. T., BARILO, S. N., SHYRIAEV, S. V. Zeeman study of Raman-active crystal-field transitions in Nd2CuO4 and Sm2CuO4. Physical Review B. 1997, 56(9), 5578-5582. ISSN 0163-1829.