Houe, 1995, 28, 1747, 10.1088/0022-3727/28/9/001
Webjorn, 1995, 31, 669, 10.1049/el:19950442
Karlsson, 1996, 32, 556, 10.1049/el:19960402
Chen, 1994, 30, 1516, 10.1049/el:19941019
Rosenman, 1997, 30, 277, 10.1088/0022-3727/30/2/016
Chen, 1996, 32, 107, 10.1049/el:19960097