分面浏览：发表日期 |
| 当前检索式 | ((ALL：Liu, DF)) |
| 限定条件 | 无 |
| 2022 1 | 2020 24 | 2019 84 |
| 2018 34 | 2017 15 | 2016 17 |
| 2015 38 | 2014 34 | 2013 28 |
| 2012 43 | 2011 30 | 2010 29 |
| 2009 22 | 2008 20 | 2007 19 |
| 2006 44 | 2005 50 | 2004 28 |
| 2003 41 | 2002 25 | 2001 22 |
| 2000 14 | 1999 10 | 1998 4 |
| 1997 8 | 1996 6 | 1995 12 |
| 1994 3 | 1993 1 | 1992 1 |
| 1991 1 | 1990 2 | 1989 2 |
| 1988 2 |
