// <I>TE-RE-RD 2017<D> : 6th International conference on ''Thermal equipment, renewable energy and rural development'', Moieciu de Sus, Romania, 8-10 june 2017 : Proc. - Bucharest : Politehnica, 2017, p. 139-144.
V. Rasheva; C. Iliev; V. Kamburova;
D. Karadaglic;
M. Velikanov и др.