194
article.php/940791.
[Pas02] Pastore, M., At-Home Internet Users Approaching Half Bil-
[PasSau02] Pastore, M., Saunders, C., Ad Spending Down, Use of
[PBMW98] Page, L., Brin, S., Motwani, R., Winograd, T., The Pag-
eRank Citation Ranking: Bringing Order to the Web, Techni-
cal Report, Computer Science Department, Stanford Univer-
[Pey01a] Peyrot, E., Informazioni su Open Directory Project, 2001,
[Pey01b] Peyrot, E., Storia di Open Directory Project, 2001,
[Pir99] Pirillo, C., Poor Richards Email Publishing, Denver, Top
Floor Publishing, 1999 (tr. it., E-mail publishing, Milano,
Hops Libri, 2000).
[Plo02] Plotkin, H., Search Me: Doom Ahead for Search Engines
[Pra02] Prather, M., Ga-Ga for Google, Entrepreneur Magazine,
[Ray01] Raymond, E. et al. (eds.), The Jargon File (Version 4.3.1),
[Ric01] Ricardela, A., Radical Simplicity: Remember the Users