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- [41] Dzerzhinsk Production Association of 'PLASTIK' open-end joint stock company Plasticheskie Massy: Sintez Svojstva Pererabotka Primenenie, 2001, (04): : 3 - 8
- [43] Springs for valves, made by 'Insajd' open-end joint stock company Gornyi Zhurnal, (01): : 64 - 65