Democracy in the World - World Atlas of Global Issues
P4cReports
A few comments on democracy indices and Turkey | Erik Meyersson
PolityProject
Charts: Visualizing 200 Years of Systems of Government
File:Polity data series map 2003.png - Wikipedia
Center for Systemic Peace. Various years. Polity IV (data- base). Vienna, VA | Rhetoric, Global conflict, Data
Democracy - Our World in Data
More than half of countries are democratic | Pew Research Center
Smashwords – Democracy Matters: Human Rights and Democracy in Thailand from 2001 to 2017 - Anocracy and Persistent Authoritarianism, Analysis of Routine, Unique, and Political Abuses, Polity IV Project Data – a book by Progressive Management