I've heard about the sites (with high pagerank), which allow to add own link in created article (the articles are shown in these pages). Can somebody link it ?
Are you talking about a place where you can write your own article, include your link inside of it, and add it to article databases for free? If so, take a look at the list here...it's the biggest I've ever seen http://www.adminfusion.com/forums/showthread.php?t=1084
you can write and submit your articles to ezinearticles and goarticles.com it's free, and it can certainly help improve your pagerank
a good idea is to do a check in G first and see how many pages an article site has indexed, a lot of the article sites has been deindexed because of the duplicate content: Examples: This site has 33,000 pages indexed, so you have agood chance of getting your article picked up by Google there. http://www.google.com/search?hl=en&...GLG:en&q=site:http://www.valuablecontent.com/ Whereas this site: http://www.google.com/search?hl=en&...&q=site:http://www.webmastertraffictools.com/ Does not even have its front page spidered.