TY  - JOUR
A1  - Goicoechea, Luis Julian
A1  - Gil-Merino, Rodrigo
A1  - Serra-Ricart, M.
A1  - Oscoz, Alejandro
A1  - Alcalde, D.
A1  - Mediavilla, E.
T1  - IAC gravitational lenses monitoring program : difference signals from 2.5 years of QSO 0957+561 observations
Y1  - 2001
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/18693
SN  - 0-7923-6974-2
ER  -