1: 30000 cryogenic current comparator with optimum SQUID readout. - Gert Rietveld; Elena Bartolomé; Javier Sesé; Pieter de la Court; Jaap Flokstra; Conrado Rillo; Agustín Camón (IEEE Trans. Instrum. Meas., 2003)

Accurate subpicoampere current source based on a differentiating capacitor with software-controlled nonlinearity compensation. - Helko E. van den Brom; Pieter de la Court; Gert Rietveld (IEEE Trans. Instrum. Meas., 2005)

Internally Damped CCC for Accurate Measurements of Small Electrical Currents. - Gert Rietveld; Pieter de la Court; Helko E. van den Brom (IEEE Trans. Instrum. Meas., 2009)