1. Notes on modulation theory;Carson;Proc. I.R.E.,1925
2. Production of single side-band for trans-atlantic radio telephony;Heising;Proc. I.R.E.,1925
3. E. B. Crutchfield, NAB Engineering Handbook
4. Modulation in Radio Telephony;Heising;Proc. I.R.E.,1921
5. High Power Outphasing Modulation;Chireix;Proc. I.R.E.,1935