^Ivanenko, O. P.; Kompanichenko, N. M.; Omel'chuk, A. O.; Rudkovs'ka, L. M.; Zinchenko, V. F. Reaction of zirconium tetrafluoride with nonstoichiometric lanthanide (samarium, europium, thulium, and ytterbium) fluorides（乌克兰語）. Ukrainskii Khimicheskii Zhurnal (Russian Edition), 2009. 75 (7-8): 83-88. ISSN: 0041-6045
^Triplett, B. B.; Dixon, N. S.; Boolchand, P.; Hanna, S. S.; Bucher, E. Low temperature Moessbauer studies of thulium compounds. Journal de Physique, Colloque, 1974. 6: 653-657. ISSN: 0449-1947 .DOI: 10.1051/jphyscol:19746144
