三篇都是sciencedirect上的文章！本人暂无权限！盼热心人帮住！

附上地址：http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VBX-45KNKMP-1C&_user=1479033&_coverDate=06%2F30%2F1981&_rdoc=5&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235938%231981%23999909997%23304631%23FLP%23display%23Volume)&_cdi=5938&_sort=d&_docanchor=&_ct=7&_acct=C000053030&_version=1&_urlVersion=0&_userid=1479033&md5=255bdca7a633daf7da7bf24112e1930e

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VBX-45MFS80-S&_user=1479033&_coverDate=03%2F31%2F1982&_rdoc=4&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235938%231982%23999899998%23306036%23FLP%23display%23Volume)&_cdi=5938&_sort=d&_docanchor=&_ct=9&_acct=C000053030&_version=1&_urlVersion=0&_userid=1479033&md5=d60a5c52dba7ae69602e08e5a9ae9c2c

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VBX-45KNKK3-K&_user=1479033&_coverDate=11%2F30%2F1977&_rdoc=9&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235938%231977%23999949997%23304628%23FLP%23display%23Volume)&_cdi=5938&_sort=d&_docanchor=&_ct=12&_acct=C000053030&_version=1&_urlVersion=0&_userid=1479033&md5=8a89ef2910de9e6c2ddbf8da2260c86a

[此贴子已经被作者于2008-10-22 22:57:13编辑过]