Heijnen, S. H., de Baar, M., Donne, A. J. H., van de Pol, M., & Hugenholtz, C. A. J. (1995). Density Perturbation Studies by Means of Pulsed Radar Reflectometry. Review of Scientific Instruments, 66, 419-421. https://doi.org/10.1063/1.1146542 (Original work published 1995)
DIFFER