New Concepts for Prevention of Ageing by means of On-line Degassing and Drying and Hermetically Sealing of Power Transformers. 2004. [PUMA: Ageing Analysis Dielectric Drying Fischer Hermetically Karl Moisture On-line Power Response Sealing Titration Transformer] URL
Comparing Various Moisture Determination Methods for Power Transformers. 2009. [PUMA: Capacitive Determination Dielectric Domain Fischer Frequency Karl Moisture Power Response Saturation Sensor Spectroscopy Titration Transformer Water] URL