Sertel, K, Volakis, JL. (2000). Incomplete LU preconditioner for FMM implementation
.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 26(4), 265-267. 10.1002/1098-2760(20000820)26:4<265::AID-MOP18>3.3.CO;2-F
Sertel, K, Volakis, JL. (2000). Incomplete LU preconditioner for FMM implementation
. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 26(4), 265-267. 10.1002/1098-2760(20000820)26:4<265::AID-MOP18>3.3.CO;2-F