1. Alton-J. (2005). Bound-to-Continuum THz Quantum Cascade Lasers (PhD Thesis), University of Cambridge, UK.
2. Arnone-D., Ciesla-C., and Pepper-M. (2000). Terahertz imaging comes into view, Physics World, 13(4), pp. 35–40.
3. Ashley-A., and Palka-F. (1973). Transmission cavity and injection stabilization of an X-band transferred electron oscillator, IEEE MTT-S International Microwave Symposium Digest, 73(1), pp. 181–182.
4. Auston-D. (1983). Impulse response of photoconductors in transmission lines, IEEE Journal of Quantum Electronics, 19(4), pp. 639–648.
5. Bartels-A., Cerna-R., Kistner-C., Thoma-A., Hudert-F., Janke-C., and Dekorsy-T. (2007). Ultrafast time-domain spectroscopy based on high-speed asynchronous optical sampling, Review of Scientific Instruments, 78(3), Art. No. 035107.