1. CCIR Place des Nations, 1211, Geneva 20, Switzerland 1974
2. CCIR VHF propagation by regular layers, sporadic- E or other anomalous ionization Place des Nations, 1211, Geneva 20, Switzerland 1976
3. CCIR Place des Nations, 1211, Geneva 20, Switzerland 1976
4. EBU VHF propagation due to sporadic ionization or the E region of the ionosphere (Band 1) 32 avenue Albert Lancaster, B-1180 Brussels, Belgium 1974
5. Sporadic-E propagation;Gerson;J. Atmos. Terr. Phys.,1955