Use of difficult signals at vertical sounding of an ionosphere
... ионосферных сигналов // Геомагнетизм и аэрономия. 1968. Т. 8, № 6. С. 69—72.
Molostova S. V., Chernova I. B.
ionospheric sounding, radio impulse, assessment of parameters, probability of detection, base of the signal, difficult signals.
70-75