Saya mau tau Rujukan dari Program Penyelidikan Auroral Aktif Frekuensi Tinggi. Jelaskan dalam bahasa melayu

C. W. Hansell (1945)."Communication system by pulses through the Earth", .

R. L. Tanner (1965). "Extremely low-frequency antenna", .

G. F. Leydorf  (1966). "Antenna near field coupling system", .

B. J. Eastlund (1987). "Method and apparatus for altering a region in the Earth's atmosfera, ionosfera, and/or magnetosfera", .

B. J. Eastlund (1991). "Method for producing a shell of relativistic particles at an altitude above the earths surface", .