1. Bystritskii, G.F. and Kudrin, B.I., Elektrosnabzhenie. Silovye transformatory (Power Supply: Power Transformers), Moscow: Yurait, 2016.
2. Alekseev, B.A., Krupnye silovye transformatory: kontrol' sostoyaniya v rabote i pri revizii (Large Power Transformers: State Control during Operation and Inspection), Moscow: Energoprogress, 2010.
3. GOST (State Standard) R 52719–2007: Power Transformers. General Technical Specifications, 2018.
4. RD 34.45-51.300-97. Ob’’em i normy ispytanii elektrooborudovaniya (RD 34.45-51.300-97: Codes and Standards for the Testing of Electrical Equipment), Alekseev, B.A., Kogan, F.L., and Mamikonyants, L.G., Eds., Moscow: ENAS, 2004, 6th ed.
5. L’vov, S.Yu., Lyut’ko, E.O., Lankau, Ya.V., L’vov, Yu.N., Komarov, V.B., Seliverstov, A.F., Bondareva, V.N., Ershov, B.G., and L’vov, M.Yu., Interrelation of surface tension, optical turbidity, and color of operational transformer oils, Power Technol. Eng., 2011, vol. 45, no. 3, pp. 240–244. https://doi.org/10.1007/s10749-011-0256-y