分面浏览：发表日期 |
| 当前检索式 | ((ALL：Instability)) |
| 限定条件 | ((专题：北京大学)) |
| 2017 39 | 2016 64 | 2015 43 |
| 2014 67 | 2013 62 | 2012 45 |
| 2011 36 | 2010 51 | 2009 47 |
| 2008 21 | 2007 29 | 2006 9 |
| 2005 11 | 2004 10 | 2003 11 |
| 2002 17 | 2001 12 | 2000 9 |
| 1999 9 | 1998 3 | 1997 8 |
| 1996 2 | 1995 3 | 1993 3 |
| 1992 2 | 1991 1 | 1990 6 |
| 1989 4 | 1988 5 | 1986 2 |
| 1984 4 | 1983 3 | 1981 1 |
