Bing found the following results
Flag of Sudan - Wikipedia
Flag of the Sudan | History, Colors & Symbols | Britannica
Flags, Symbols & Currency of Sudan - World Atlas
Flag of Sudan - Colors, Meaning, History - Edarabia
Flag of Sudan | Flagpedia.net
World Factbook Glyph
Flag of Sudan: learn the flags of the world
The story behind Sudan's flag - Radar Africa
Sudan Flag - Nations Online Project
The significance of Sudan's national flag - The Sudan Times