Hyun, E., and J.-H. Lee. “Waveform Design With Dual Ramp-Sequence for High-Resolution Range-Velocity FMCW Radar”. Elektronika Ir Elektrotechnika, vol. 22, no. 4, Aug. 2016, pp. 46 -51, doi:10.5755/j01.eie.22.4.15916.