Les transformateurs a courants alternatifs : simples et polyphasés: théorie, construction, applications / Gisbert Kapp; A. O. Dubsky & G. Chenet
Introduction to modern physics / F. K. Richtmyer e E. H. Kennard
Protection from power circuits : a paper / S. C. Bartholomew
Electrical engineering measuring instruments for commercial and laboratory purposes / G. D. Aspinall Parr