The nonlinear theory of electric oscillations

[21] Frequency division [J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1930, 18 (11): : 1960 - 1970

[22] HOLLMAN HE, 1931, E N T, V8, P449

[23] Hudec E., 1929, ARCH ELEKTROTECH, V22, P459

[24] A convenient method for referring secondary frequency standards to a standard time interval [J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1929, 17 : 0252 - 0271

[25] JANET M, 1925, ANN P T T, V14, P1193

[26] JOBST G, 1927, TELEFUNKEN ZEITUNG, V9, P11

[27] JOOS G, 1922, JAHR DRAHT TEL TEL Z, V20, P416

[28] JULAJIEW WP, 1934, J Z TECH PHYS, V4, P48

[29] Kirschstein F., 1930, ARCH ELEKTROTECH, V24, P731

[30] A new frequency transformer or frequency changer [J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1927, 15 (08): : 669 - 678

[21] Frequency division [J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1930, 18 (11): : 1960 - 1970

[22] HOLLMAN HE, 1931, E N T, V8, P449

[23] Hudec E., 1929, ARCH ELEKTROTECH, V22, P459

[24] A convenient method for referring secondary frequency standards to a standard time interval [J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1929, 17 : 0252 - 0271

[25] JANET M, 1925, ANN P T T, V14, P1193

[26] JOBST G, 1927, TELEFUNKEN ZEITUNG, V9, P11

[27] JOOS G, 1922, JAHR DRAHT TEL TEL Z, V20, P416

[28] JULAJIEW WP, 1934, J Z TECH PHYS, V4, P48

[29] Kirschstein F., 1930, ARCH ELEKTROTECH, V24, P731

[30] A new frequency transformer or frequency changer [J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1927, 15 (08): : 669 - 678