CAPEHART, B. L. .; SALAS, C. E. .; TURNER, W. C. .; PARKER, S. A. . N EW C ERTIFICATION PROGRAM AVAILABLE FOR DISTRIBUTED G ENERATION AND COMBINED HEAT AND P OWER P ROFESSIONALS. Distributed Generation & Alternative Energy Journal, [S. l.], v. 18, n. 3, p. 71–80, 2003. DOI: 10.13052/dgaej2156-3306.1833. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14441. Acesso em: 15 may. 2026.