J. P. Downs
发表
Y. W. Kim,
J. P. Downs,
F. O. Soechting,
1995
.
Cheng Qian,
Kozo Saito,
J. P. Downs,
1997
.
J. P. Downs,
F. O. Soechting,
W. Abdel-Messeh,
1994
.