Altun O, Bilcen S. Spectrophotometric investigation of DL-tryptophan in the presence of Ni(II) or Co(II) ions. Eur. J. Chem. [Internet]. 2012 Dec. 31 [cited 2024 Nov. 21];3(4):411-5. Available from: https://eurjchem.com/index.php/eurjchem/article/view/482