Jacobsen, E.; Shiren, N.; Tucker, E. (1959). "Effects of 9.2-kMc/sec Ultrasonics on Electron Spin Resonances in Quartz". Physical Review Letters. 3 (2): 81. Bibcode:1959PhRvL...3...81J. doi:10.1103/PhysRevLett.3.81.
Jacobsen, E.; Shiren, N.; Tucker, E. (1959). "Effects of 9.2-kMc/sec Ultrasonics on Electron Spin Resonances in Quartz". Physical Review Letters. 3 (2): 81. Bibcode:1959PhRvL...3...81J. doi:10.1103/PhysRevLett.3.81.