Alternatives to Google Scholar, dblp to measure scientific impact of a research article? Are there any cross-platform websites to measure scientific impact of any research article? I am aware of dblp, Google Scholar and Microsoft Academic Search. Recently, ResearchGate is quite popular. However, all these are not optimal in several aspects.

For example, Google Scholar is a good platform for citation index, particularly h-index of any author; dblp is intended for most authentic, however lacks in the timely updating. ResearchGate seems to be updated mostly by individual scholars. I know that it is not possible to find a comprehensive database with authentic information contained. Thus, the criteria may be as follows: timely manner, self citation exclusion, information entered by authors or robot cross-checked by any person, and most importantly free access to scholars. (Scopus is not free.)
You have a compilation to scientific research referencing websites and networks, and some links to further information, here (post in spanish language, with automatic transation available).