PaperEcho phenomena in piezoelectric crystalsN.S. Shiren, R.L. Melcher, et al.Physical Review Letters
PaperTheory of Phase and Amplitude Bunching in Traveling Wave InteractionsJ.A. Armstrong, N.S. ShirenIEEE JQE
PaperMeasurement of signal velocity in a region of resonant absorption by ultrasonic paramagnetic resonanceN.S. ShirenPhysical Review