Matthews J (ed.): 14th International Conference on Electrostatics 2015 : Southampton, United Kingdom, 12-16 April 2015. Journal of Physics Conference Series, volume 646; Curran Associates Inc., Red Hook, NY; p. 012026; ISBN 978-1-5108-1473-8
Kolcun M, Kurimský J, Kolcunová I (eds.): 8th International Scientific Symposium on Electrical Power Engineering (ELEKTROENERGETIKA 2015). Curran Associates, Inc., Red Hook, NY; pp. 560-563; ISBN 978-1-5108-1142-3