共 28 条
[3]
BEUTLER H, 1940, PHYS REV, V57, P69
[6]
Edln B., 1966, METROLOGIA, V2, P71, DOI [DOI 10.1088/0026-1394/2/2/002, 10.1088/0026-1394/2/2/002]
[8]
MASER - NEW TYPE OF MICROWAVE AMPLIFIER, FREQUENCY STANDARD, AND SPECTROMETER
[J].
PHYSICAL REVIEW,
1955, 99 (04)
:1264-1274