http://books.google.com/books?vid=ISBN83-88973-58-4
500
http://books.google.com/books?vid=ISBN83–88973–58–4
2
http://books.google.com/books?vid=ISBN83−88973−58−4
1
http://books.google.com/books?vid=ISBN8388973584
1
CiteRank
CiteRank - project for automatic evaluation of the sources in Wikipedia articles.