2004, IEC 60450, “Measurement of the average viscometric degree of polymerization of new and aged cellulosic electrically insulating materials,”

2005, IEC 60216-2, “Electrical insulating materials - Thermal endurance properties - Part 2: Determination of thermal endurance properties of electrical insulating materials - Choice of test criteria,”

2011, IEEE C57.91, “IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators,”

2024, ASTM D5837, “Standard Test Method for Furanic Compounds in Electrical Insulating Liquids by High-Performance Liquid Chromatography (HPLC),”

1993, IEC 61198, “Mineral insulating oils - Methods for the determination of 2-furfural and related compounds,”

A. M. Emsley, X. Xiao, R. J. Heywood, M. Ali, 2000, Degradation of cellulosic insulation in power transformers. Part 2: Formation of furan products in insulating oil, IEE Proceedings-Science, Measurement and Technology, Vol. 147, No. 3, pp. 110-114

C. H. Zhang, J. M. K. Macalpine, 2006, Furfural Concentration in Transformer Oil as an Indicator of Paper Ageing, Part 1: A Review, pp. 1088-1091

M. A. Talib, M. A. A. Aziz, Y. Balasubramaniam, Y. Z. Y. Ghazali, M. R. Z. Abidin, M. F. M. Yousof, 2020, Transformer Ageing Investigation and Correlation of Furanic Compound and Degree of Polymerization for Power Transformer Life Assessment, pp. 240-244

M. Dong, Z. Yan, G. J. Zhang, 2003, Comprehensive diagnostic and aging assessment method of solid insulation in transformer, pp. 137-140

H. Lütke, I. Höhlein, A. J. Kachler, 2002, Transformer aging research on furanic compounds dissolved in insulating oil

F. Ortiz, C. Fernández, A. Santisteban, F. Delgado, A. Ortiz, 2016, Estimating the age of power transformers using the concentration of furans in dielectric oil, Renewable Energy and Power Quality Journal, Vol. 1, No. 14, pp. 1011-1015