By Pinto J.A.D.   Coimbra A.P.   Antunes C.L.   Fernández X.M. L   Donsión M.P.   in COMPEL: Int J for Computation and Maths. in Electrical and Electronic Eng.

ISSN:0332-1649|17|3|378-381

Emerald Group Publishing Ltd‎(1998)‎

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