// <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. 439-444.
M. Petrov; A. Z. Atanasov; I. Hristakov;
Hr. Beloev;
S. S. Biris и др.