https://www.ainonline.com/aviation-news/defense/2006-11-27/aero-vodochody-l-159b-now-training-system
Aero Vodochody is showing key elements of its L-159B Advanced Training System making their international debut here at the Farnborough air show (Hall
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https://www.armyrecognition.com/news/aerospace-news/2025/vietnam-completes-its-fleet-of-l-39-skyfox-from-aero-vodochody-key-modernization-for-pilot-training
Vietnam Completes its Fleet of L-39 Skyfox from Aero Vodochody Key Modernization for Pilot Training
vietnamcompletesfleetskyfoxaero