Richard Ekman
发表
Richard Ekman,
Richard E. Quandt,
1999
.
Richard Ekman,
Millicent Abell,
Myles Brand,
2000
.
Axel Nordin,
Richard Ekman,
2012
.
Richard Ekman,
Garth Rusell,
John F. Noonan,
2004
.
Richard Ekman,
1989
.