"Welcome to the Colour Index". Colour Index. Society of Dyers and Colourists & American Association of Textile Chemists and Colourists. Retrieved 3 September 2021.
M. Amine Fourati, Thierry Maris, W. G. Skene, C. Géraldine Bazuin, and Robert E. Prud’homme "Photophysical, Electrochemical and Crystallographic Investigations of the Fluorophore 2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene" J. Phys. Chem. B, 2011, volume 115, 12362–12369.doi:10.1021/jp207136k