1. Katalog “Bestsvetnoe opticheskoe steklo” (Catalog,1990
2. OST (Industry Standard) 3-4888-80: Optical Colourless Glass. Synthetic Structure. https://www.russiangost.com/p-112266-ost-3-4888-80.aspx. Cited April 8, 2024.
3. Katalog SSSR/DDR “Opticheskoe steklo/Optisches Glass” (Catalog USSR/DDR “Optical Glass/Optisches Glass”), Moscow: Mashpriborintorg.
4. OST (Industry Standard) 3-4391-81: Optical Glass of Series 100. Synthetic Structure. https://www.russiangost.com/p-112294-ost-3-4931-82.aspx. Cited April 8, 2024.
5. OST (Industry Standard) 3-1768-73: Optical Glass of Series 200 and N. Synthetic Structure.