White papers are among the best types of cornerstone content. These robust resources provide your audience with an in-depth examination of topics that really matter to them. They deliver a potent one-two punch of content that both builds your credibility and solves customer pain points.

Forty-two percent of the responding SEO experts have created white papers and 60% of those find them to be ideal content for earning links. However, as with infographics, content quality is key.

Reference:
https://contentmarketinginstitute.com/2017/11/types-content-links/