1. A. V. Makarevich, L. S. Pinchuk, and V. A. Gol’dade, Electric Fields and Electroactive Materials in Biology and Medicine (Inst. Mekh. Metallopolim. Sist., Gomel, 1998).
2. Ya. Z. Grinberg, Inzh. Vestn. Dona, No. 4/2 (2014). http://ivdon.ru/uploads/article/pdf/12_grinberg.pdf_132a9182db.pdf.
3. A. R. Blythe, T. Blythe, and D. Bloor, Electrical Properties of Polymers (Cambridge Univ. Press, 2005).
4. Electrets, Ed. by G. M. Sessler (Springer, 1987).
5. M. Eguchi, Philos. Mag. 49, 178 (1925).