Infographic: Longest-serving world leaders in power - Times of India
Chart: Longest Serving National Leaders | Statista
Radio Free Europe/Radio Liberty - Putin is the longest-serving leader since Stalin. Here's how he compares with some other world leaders: | Facebook
How the world's longest-serving leaders keep power, and hand it over - Axios
Infographic: Longest-serving world leaders in power - Times of India
Chart: Vladimir Putin Becomes Russia's Second Longest-Serving Leader | Statista
Quartz Africa on Twitter: "Two African strongmen, Algeria's Abdelaziz Bouteflika and Sudan's Omar al-Bashir, have within days been kicked off the list of Africa's longest-serving presidents. https://t.co/3GHparjcmg" / Twitter
Longest-serving world leaders
The Problem with Long-Term Leaders
Chart: How Long Can World Leaders Serve? | Statista