Study of possibilities of using renewable energy sources among economic entities in the Vetovo municipality (Bulgaria) : Methodology of the survey

Kunev, S. (). Study of possibilities of using renewable energy sources among economic entities in the Vetovo municipality (Bulgaria) : Methodology of the survey. // <I>Proc.<D> Union of scientists - Ruse. Sixth intern. conf. "Energy efficiency and agricultural engineering", EE&AE, Ruse, Bulgaria, 11-12 november 2015, p. 646-653..