Compartilhamento dos postes : fundamentos teóricos e soluções práticas / Alexandre Rosa Lopes
IEC 62053-11 [documento eletrónico] : electricity metering equipment (a.c.) – particular requirements – Part 11; : electromechanical meters for active energy (classes 0,5, 1 and 2) / International Electrotechnical Commission
Siemens 100 anos a projectar o futuro : Portugal 1905-2005 / Jorge Fernandes Alves; rev. Benedita Rolo, inv. Edmundo Lassberg