Half Guard: BJJ Fundamentals - Go Further Faster by John Danaher – BJJ Fanatics
Half Guard – Wikipedia
Half guard - Wikipedia
How To Combat A Half Guard Player In BJJ (Videos) | Evolve Vacation
Grapplearts Guard Sweeps - Closed Guard, Open Guard and Half Guard Sweeps for BJJ, Submission Grappling and MMA by Stephan Kesting:Amazon.fr:Appstore for Android