Gabrovska-Evstatieva, K., & Evstatiev, B.
().
Cost-benefit analysis of PV generators at residential buildings in the region of Ruse, Bulgaria. // <I>JAES<D>J. of Applied engineering science, 15, 2017, № 2, p. 155-165, DOI: 10.5937/jaes15-12875.. (4181),