David Donald (UK): Rotorcraft – Korea’s Surion Helicopter Flies. Korea Aerospace Industries (KAI) flew the prototype of its Surion utility helicopter for the first time on March 10. In: ainonline.com. AIN Media Group, Inc., 15. März 2010, abgerufen am 30. Juni 2025 (englisch).
Thai Military and Asian Region. In: thaimilitaryandasianregion.wordpress.com. 26. Oktober 2021, abgerufen am 30. Juni 2025 (englisch, Ursprungsquelle beispielsweise Army Technology): „The preliminary design review (PDR) of the helicopter was completed in June 2007. The first prototype was rolled out in July 2009. Flight tests were conducted later on the initial prototype model.“
Thai Military and Asian Region. In: thaimilitaryandasianregion.wordpress.com. 26. Oktober 2021, abgerufen am 30. Juni 2025 (englisch, Ursprungsquelle beispielsweise Army Technology): „The preliminary design review (PDR) of the helicopter was completed in June 2007. The first prototype was rolled out in July 2009. Flight tests were conducted later on the initial prototype model.“