Plathner, B., Schicke, M., Lehnert, T., Gundlach, K. H., Rothermel, H., Aoyagi, M., et al. (1997). NbN-MgO-NbN junctions prepared on room-temperature quartz substrates for quasiparticle mixers. IEEE Transactions on Applied Superconductivity, 7(2), 2603-2606.