KATUNIN, Andrzej, and Monika CHUDA-KOWALSKA. “Assessment of Internal Damages in Sandwich Panels via Active Thermography”. Engineering Transactions 63, no. 2 (January 8, 2015): 171–180. Accessed June 9, 2025. https://et3.ippt.pan.pl/index.php/et/article/view/237.