Müller, C. J., Doert, T., & Schwarz, U. (2011). High-pressure synthesis of rare-earth metal disulfidesand diselenides LnX2 (Ln = Sm, Gd, Tb, Dy, Ho, Er and Tm; X = S, Se). Zeitschrift für Kristallographie - Crystalline Materials, 226(8), 646-650. doi:10.1524/zkri.2011.1386.