分面浏览：发表日期 |
| 当前检索式 | ((ALL：Urea)) |
| 限定条件 | ((内容类型：期刊论文)) |
| 2024 1 | 2023 8 | 2022 25 |
| 2021 53 | 2020 60 | 2019 116 |
| 2018 179 | 2017 161 | 2016 179 |
| 2015 173 | 2014 146 | 2013 162 |
| 2012 159 | 2011 152 | 2010 209 |
| 2009 109 | 2008 93 | 2007 91 |
| 2006 67 | 2005 66 | 2004 47 |
| 2003 48 | 2002 59 | 2001 38 |
| 2000 26 | 1999 9 | 1998 16 |
| 1997 15 | 1996 16 | 1995 10 |
| 1994 5 | 1993 12 | 1992 10 |
| 1991 2 | 1990 1 | 1989 2 |
| 1988 3 | 1987 1 | 1986 1 |
| 1984 2 | 1983 2 | 1982 1 |
