E. Usher
发表
Thomas Bruckner,
Lori Bird,
Patrick Lamers,
2011
.
E. Usher,
A. Ralph,
1995,
Research in developmental disabilities.
Wim Turkenburg,
Aaron Smith,
Maureen Hand,
2012
.
E. Usher,
2005
.
A. Garg,
F. Denton,
E. Usher,
2006
.
E. Usher,
2004
.
H. Chum,
A. Faaij,
D. Arent,
2012
.