"Thulium". www.chemicool.com. Diakses tanggal 24 Maret 2023.
doi.org
Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017. and Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke (2003-12-15). "Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation". Journal of Organometallic Chemistry. 688 (1–2): 49–55. doi:10.1016/j.jorganchem.2003.08.028.
Krishnamurthy, Devan; Vivian Weinberg; J. Adam M. Cunha; I-Chow Hsu; Jean Pouliot (2011). "Comparison of high–dose rate prostate brachytherapy dose distributions with iridium-192, ytterbium-169, and thulium-170 sources". Brachytherapy. 10 (6): 461–465. doi:10.1016/j.brachy.2011.01.012. PMID21397569.
Haley, Thomas J.; Komesu, N.; Flesher, A. M.; Mavis, L.; Cawthorne, J.; Upham, H. C. (1963). "Pharmacology and toxicology of terbium, thulium, and ytterbium chlorides". Toxicology and Applied Pharmacology. 5 (4): 427–436. doi:10.1016/0041-008X(63)90014-0.
Bruce, David W.; Hietbrink, Bernard E.; Dubois, Kenneth P. (1963). "The acute mammalian toxicity of rare earth nitrates and oxides". Toxicology and Applied Pharmacology. 5 (6): 750–759. doi:10.1016/0041-008X(63)90067-X. PMID14082480.
Krishnamurthy, Devan; Vivian Weinberg; J. Adam M. Cunha; I-Chow Hsu; Jean Pouliot (2011). "Comparison of high–dose rate prostate brachytherapy dose distributions with iridium-192, ytterbium-169, and thulium-170 sources". Brachytherapy. 10 (6): 461–465. doi:10.1016/j.brachy.2011.01.012. PMID21397569.
Bruce, David W.; Hietbrink, Bernard E.; Dubois, Kenneth P. (1963). "The acute mammalian toxicity of rare earth nitrates and oxides". Toxicology and Applied Pharmacology. 5 (6): 750–759. doi:10.1016/0041-008X(63)90067-X. PMID14082480.
rareelementresources.com
Castor, Stephen B.; Hedrick, James B. "Rare Earth Elements"(PDF). Diakses tanggal 24 Maret 2023.Parameter |name-list-style= yang tidak diketahui akan diabaikan (bantuan)