http://www.damianculotta.com.ar/2009/02/15/backup-de-tablas-especificas-en-postgresql/

http://www.damianculotta.com.ar/2008/08/26/automatizar-backups-de-postgresql/

http://freeopenidea.blogspot.mx/2008/11/creating-sha1-hashing-function-for.html

http://caronates.wordpress.com/2010/01/03/instalar-postgresql-y-configurar-phppgadmin/

http://www.martiniglesias.eu/blog/formularios-web-con-jquery-validate-y-envio-por-phpmailer-y-gmail/100

http://www.jamboreebliss.com/2010/03/18/php-mail-using-gmail-smtp-authentication/

http://yacoding.blogspot.mx/2006/07/howto-install-dbdesigner-4-on-ubuntu.html

http://www.programacionweb.net/articulos/articulo/?num=502&pag=1

como instalar aplicasiones tgz, rpm, y deb

http://www.ubuntu-es.org/node/12100#.UUoYuVGYNa0

http://www.postgresqlya.com.ar/

http://www.yiiframework.com/wiki/49/update-content-in-ajax-with-renderpartial/