Tomchuk, P., M. Brodyn, V. Volkov, and V. Lyakhovetskii. “Third-Order Optical Nonlinearity of Noble Metal Nanostructures”. Ukrainian Journal of Physics 8, no. 1 (December 11, 2019): 50. Accessed July 14, 2020. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019668.