2E. Kuffel, W. S. Zaengl. High voltage engineering, Pergamon Press, 1984.
3D.R. Beasley,et al. Comparative study of three methods for computing electric field. Proc. IEE,1979(126) :126.
4Qiushi Chen, Adalbert Konrad, A review of finite element open bound-ary techniques for static and quasi -static eleetrnmagnetic field problems, IEEE Trans. on Magnetics, 1997,33( 1 ) :663 -676.
5J.F. lmhoff,etc. An original solution unbounded electromagnetic 2D - and 3D -problems throghout the finite element method [ J ]. IEEE, Tran. On magnetics, 1990,26(5 ) : 1659 - 1661.
