Dart - Differences Between extends, implements and mixin
Support with and implements keyword in generic constraint, allow multiple constraints for one generic type. · Issue #1152 · dart-lang/language · GitHub
Flutter: extends, implements, mixin in Dart | Medium
Dart - extends, with and implements Keywords - TAE
Demystifying Dart Class Relationships: Implement, Extends, and With Explained"
Dart: extends vs implements vs with | by Manoel Soares Neto | Medium
Dart - extends Vs with Vs implements - GeeksforGeeks