ELISA: A cryocooled 10 GHz oscillator with 10-15 frequency stability - Grop,S; Bourgeois,PY; Bazin,N; Kersale,Y; Rubiola,E; Langham,C; Oxborrow,M; Clapton,D; Walker,S; De,Vicente J; Giordano,V (REVIEW OF SCIENTIFIC INSTRUMENTS, 2010)