Decreto nº 39237 de 1953-06-06 / Ministério do Ultramar. Direcção-Geral de Fomento
Quelques considérations sur les sous-stations modernes a haute tension / S. Margoulies
Drischer.Wegberg. Outdoor-switch-Disconnectors, outdoor-disconnectors, outdoor-fuse holders
Andreson. Your one source force connectors : Transmission, overhead distribution, substation, construction, industrial compreension tools
Aproveiamentos hidroeléctricos dos rios Zêzere e Tejo