Helicopters use aerodynamic tail rotors (or alternate anti-torque configurations like NOTAR) rather than reaction wheels to counteract main rotor torque, making this a matter of common knowledge that does not require citation.
The claim refers to basic, foundational helicopter physics and engineering. Helicopters counteract main rotor torque using aerodynamic anti-torque devices (such as tail rotors) rather than conservation-of-angular-momentum devices like reaction wheels (which are used in spacecraft). This is a well-established, trivially true engineering fact that falls under common knowledge, requiring no citation despite the provided retrieved papers discussing various unrelated rotorcraft topics.