1. G.M. Sessler (Ed.), Electrets, Vol. 1, 3rd Edition, Laplacian Press, Morgan Hill, CA, 1999.
2. R. Gerhard-Multhaupt (Ed.), Electrets, Vol. 2, 3rd Edition, Laplacian Press, Morgan Hill, CA, 1999.
3. R. Kressmann, G.M. Sessler, P. Günther, Space-Charge Electrets, in: R. Gerhard-Multhaupt (Ed.), Electrets, Vol. 2, 3rd Edition, Laplacian Press, Morgan Hill, CA, 1999, pp. 1–40 (Chapter 9).
4. G.M. Sessler, Distribution and transport of charge in polymers, in: R. Gerhard-Multhaupt (Ed.), Electrets, Vol. 2, 3rd Edition, Laplacian Press, Morgan Hill, CA, 1999, pp. 41–80 (Chapter 10).
5. Charge distribution and transport in polymers;Sessler;IEEE Trans. Dielectrics Electr. Insul.,1997