F. Mamedov, P. Čermák, J. Jakůbek, K. Smolek, I. Štekl, J. Vlášek: Measurement of radon activity in air using electrostatic collection to the Timepix detector. Journal of Instrumentation 8(03), C03011-C03011 (2013). doi:10.1088/1748-0221/8/03/C03011