Jm. Zhou et al., HP-VERSION ADAPTIVE ANALYSIS OF NONLINEAR MAGNETIC-FIELDS WITH QUADRILATERALS, IEEE transactions on magnetics, 31(3), 1995, pp. 1745-1748
Making use of the author's Delaunay based automatic quadrilateral mesh
generator and the Zienkiewicz-Zhu error estimator, a prescribed accur
acy can be achieved within one, at most two h-refinement stages with o
ptimal convergence rate. Uniform increase of the element interpolation
order p on the h-refined mesh reaches simple and rapid solution impro
vement.