Evan E. Bolton; Yanli Wang; Paul A. Thiessen; Stephen H. Bryant (2008). „Chapter 12 PubChem: Integrated Platform of Small Molecules and Biological Activities”. Annual Reports in Computational Chemistry. 4: 217—241. doi:10.1016/S1574-1400(08)00012-1.
Hoekstra PJ, Anderson GM, Troost PW, Kallenberg CG, Minderaa RB (2007). „Plasma kynurenine and related measures in tic disorder patients”. European Child & Adolescent Psychiatry. 16 Suppl 1: 71—7. PMID17665285. doi:10.1007/s00787-007-1009-1.|access-date= захтева |url= (помоћ)
Moroni F (1999). „Tryptophan metabolism and brain function: focus on kynurenine and other indole metabolites”. European Journal of Pharmacology. 375 (1-3): 87—100. PMID10443567.|access-date= захтева |url= (помоћ)
Hoekstra PJ, Anderson GM, Troost PW, Kallenberg CG, Minderaa RB (2007). „Plasma kynurenine and related measures in tic disorder patients”. European Child & Adolescent Psychiatry. 16 Suppl 1: 71—7. PMID17665285. doi:10.1007/s00787-007-1009-1.|access-date= захтева |url= (помоћ)
Saito, Y., Hayaishi, O., Rothberg, S. (1957). „Studies on oxygenases; enzymatic formation of 3-hydroxy-L-kynurenine from L-kynurenine”. J. Biol. Chem. 229 (2): 921–34. PMID13502353.CS1 одржавање: Вишеструка имена: списак аутора (веза)
