Cheberiachko S, Cheberiachko Y, Deryugin O, Kravchenko B, Nehrii T, Serhii N and Zolotarova O, “Increasing the Insulation Properties of Filter Respirators to Protect miners’ Respiratory Organs from Dust” (2023) 38 Rudarsko-geološko-naftni zbornik accessed November 24, 2024