1、Income and price elasticities of demand at low levels of real income
Author:Henri Theil and Renate Finke
Economics Letters
Volume 18, Issue 1, 1985, Pages 1-5
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V84-4590Y99-16H&_user=10&_coverDate=12%2F31%2F1985&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1481956884&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=fb9a43d336c1739574bca58b20ca4d5e&searchtype=a
2、The demand for energy : Cross-country evidence using the Florida model
Author:James L. Seale, Jr. , Wayne E. Walker and In-Moo Kim
Energy Economics
Volume 13, Issue 1, January 1991, Pages 33-40
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V7G-458XJW9-77&_user=10&_coverDate=01%2F31%2F1991&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1481960392&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=2e3c04bb515cfb368b3ba5bdbbb78eac&searchtype=a
3、Cross-country diffusion of the Internet
Author:Sampsa Kiiski and Matti Pohjola
Information Economics and Policy
Volume 14, Issue 2, June 2002, Pages 297-310
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V8J-44X0560-7&_user=10&_coverDate=06%2F30%2F2002&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1481963024&_rerunOrigin=scholar.google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=63278d49f79ba140d79570e291f94183&searchtype=a
4、Extending the sample size in cross-country demand analysis
Author:James Seale, Jr. and Henri Theil
Economics Letters
Volume 23, Issue 2, 1987, Pages 209-212
http://www.sciencedirect.com/science/article/B6V84-458WMKX-6G/2/2b370d6e90fddcd4eb43ddf3c4cd9a28