N. Benkova

Spherical harmonic analysis of the Sq‐variations, May‐August 1933

N. Benkova, 1940 .

Principal results of U.S.S.R. ionospheric absorption measurements in the I.G.Y.-I.G.C. using the pulse method

N. Benkova, 1965 .

Spherical harmonic analysis of the geomagnetic field of the Brunhes epoch

N. V. Adam, V. Bucha, T. N. Cherevko, 1975 .

Spherical harmonic analyses of the palaeomagnetic field

N. V. Adam, A. Khramov, T. N. Cherevko, 1973 .

Spherical harmonic analysis of declination and secular geomagnetic variation 1550–1960

N. V. Adam, T. N. Cherevko, N. Benkova, 1970 .