Flappy Bird is most popular in the U.S., but the contagion is

Now a lone Hanoi game developer has the No. 1, 2, and 8 top free apps in the U.S. iOS app store.

The Vietnamese entrepreneurship paradox: how can entrepreneurs thrive without political and economic freedom?

Connecting Across Distance A Coronavirus Cross-Curricular Project #Covid19pbl

Flappy Bird, Smosh Wiki

How do social games become viral? - Quora

What happened to Flappy Bird? - FourWeekMBA

Why do some birds flap their wings while others glide? › Ask an Expert (ABC Science)

Books: game design

Prestige, Proximity, and Prejudice: How Google Search Terms Diffuse across the World1

Flappy Bird Is Most Searched-for Game, According to Google

This Pioneering Collaboration Will Open a New Window Into Bird Migration

Highly pathogenic avian influenza detected in Dubois County

Beware Flappy Bird clones carrying malware

The Most Fascinating Birds Will Be the First to Go Extinct - The New York Times

Short Stories by John Arthur Barry Volume 3