Here you can find the official SEO related guidelines of Yandex

 

Search optimization Guide

• Tips for Webmasters
• Yandex Webmaster Tool
• Crawlers Does Yandex Use
• Yandex.com Keyword Research tool (by location)
• Using Robots.txt with Yandex
• How Yandex uses Schema.org

International SEO

• Localized Page Markup
• Regionality

Mobile SEO

• Mobile Websites