IC Audio Power Amplifiers and Zobel Networks: One Size Does Not Fit All - EE Times
Zobel network - Wikipedia
Avondale Audio - On a technical note: The Zobel network. This seemingly innucuous collection of just three or four components has never, to my mind, been explained fully in its use. Visiting
Zobel network - Wikiwand
Zobel network - Wikipedia
Little Things: Using a Zobel Network to Reduce Harshness with Electrostatic Speakers - HomeTheaterHifi.com