citation counts

References

116

USA, 1996

39

ENGLAND, 1997

23

PEOPLES R CHINA, 2015

22

CANADA, 1998

11

AUSTRALIA, 1998

11

JAPAN, 2000

10

TAIWAN, 2o14

10

SOUTH AFRICA, 1999

10

GERMANY, 1993

9

NEW ZALAND, 2014