Demidov, V.
, Belyaev, A.
, Sakharov, B.
, Jljanov, A.
and Walls, F.
(1993),
Passive Hydrogen Maser Frequency Stability and Accuracy Investigations, 7^uth^ European Frequency and Time Forum , Neuchtel, 1, SZ
(Accessed November 2, 2024)