5Du Y, Zahn M, Lesieutm B C. Moisture equuilirium in transformer paper-oil systems [J]. IEEE Electr. Insul. Mag., 1999,15 : 11-20.
6DU Y, Mamishev A V, Lesieutre B C. Moisture solubility for differently conditioned transformer oils[J]. IEEE Trans. Diele. & Elect. Insul. 2001,8(5):805-811.
7MARGOLIS S A,ANGELO JACOB B.Interlaboratory assessment of measurement precision and bias in the coulometric Karl Fischer determination of water[J].Anal Bioanal Chem,2002,374:505-512.
