Masunov, Artem E., and Ivan A. Mikhailov. “Theory and Computations of Two-Photon Absorbing Photochromic Chromophores”. European Journal of Chemistry 1, no. 2 (June 15, 2010): 142–161. Accessed May 6, 2024. https://www.eurjchem.com/index.php/eurjchem/article/view/119.