1. R. Chaoui and A. Messaoud, Desalination 209, 118 (2007).
2. Hyukyong Kwon, Jaedoo Lee, Minjeong Kim, and Soohong Lee, ISRN Nanotechnol. 2011, Article ID 716409 (2011).
3. Handbook of Porous Silicon, Ed. by L. Canham (Springer, 2014).
4. V. V. Tregulov, Tech. Phys. 59, 1413 (2014).
5. M. Lampert and P. Mark, Current Injection in Solids (Academic, New York, 1970; Mir, Moscow, 1973).