Development of express method for liquid dielectric quality control as a step to increase the reliability and effectiveness of oil-filled equipment exploitationSvetlana Vysogorets, Alexandr Nazarythev, Alexey Tadjibaev and Ilia VysogoretsE3S Web Conf., 25 (2017) 01013DOI: https://doi.org/10.1051/e3sconf/20172501013