@ARTICLE {8524,
author={C. M. P. Cabrita and D. S. B.  Fonseca and M.R.A. Calado and A. Espírito Santo},
doi={},
journal={WSEAS Transactions on Power Systems},
title={Design of the Commutator Series Motor Operating in Both Direct Current and Single-Phase Electric Traction},
year={2006},
month={July},
volume={1},
number={7},
pages={1273-1281},
ISSN={1790-5060}
}