GAAFER, Fatma Nafaa. “Perfect Absorption for Modulus-Near-Zero Acoustic Metamaterial in Air or Underwater at Low-Frequency”. Archives of Acoustics 47, no. 1 (March 10, 2022): 25–31. Accessed January 13, 2025. https://acoustics3.ippt.pan.pl/index.php/aa/article/view/2995.