* [http://groups.yahoo.com/group/primenumbers/message/14113 Repost of an announcement email to the primenumbers ''Yahoo!'' group]
* [{{Cytuj stronę | url = http://www.rsasecurity.com/rsalabs/node.asp?id=2096 | tytuł = RSA Labs' take on the factorization | opublikowany = rsasecurity.com | archiwum = https://web.archive.org/web/20061224002937/http://www.rsasecurity.com/rsalabs/node.asp?id=2096 RSA| Labs'zarchiwizowano take= on the factorization]2006-12-24}}