Phys Rev B Condens Matter
October 1996
Phys Rev B Condens Matter
September 1996
Phys Rev B Condens Matter
February 1996
Phys Rev B Condens Matter
February 1996
Phys Rev B Condens Matter
December 1995
Phys Rev B Condens Matter
December 1995
Phys Rev B Condens Matter
September 1995
Phys Rev B Condens Matter
June 1995
Phys Rev B Condens Matter
March 1995
Phys Rev B Condens Matter
November 1994