Medvid', Artur, et al. “Influence of Powerful Laser Radiation on Formation of Pores in Si by Electrochemical Etching”. Journal of Automation, Mobile Robotics and Intelligent Systems, vol. 3, no. 4, Jan. 2013, pp. 166-8, https://jamris.d.tomp.pl/index.php/JAMRIS/article/view/78.