TY - JOUR T1 - Solutions of large-scale electromagnetics problems using an iterative inner-outer scheme with ordinary and approximate multilevel fast multipole algorithms A1 - Ergul, O. A1 - Malas, T. A1 - Gurel, L. JA - Progress in Electromeganetics Research Y1 - 2010 VL - 106 SP - 203 EP - 223 ER -