Google to improve and filter Play Store app ratings

Play Store users on phones will see app ratings based on the average of submissions from only the country they are registered

App Store and Google Play Algorithms Uncovered

Filter Android Play Store Reviews Based on Phone, App Version

The ultimate guide to Google Play and App Store ratings and reviews

9 tips for working with reviews on App Store and Google Play — Asodesk Blog

22 great ideas to improve app ratings and reviews in app stores!

The ultimate guide to Google Play and App Store ratings and reviews

Tips for Ranking Your Application on Play Store and App Store, by PieTechnoLabs

Changes to Google Play Average Rating Calculation

Google is making Play Store ratings and reviews substantially better with one small change - PhoneArena

AppsMarket - Apps on Google Play