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Zakharov, V.; Crifo, J.-F.; Rodionov, A.V.; Rubin, Martin; Altwegg, Kathrin (2018). The near-nucleus gas coma of comet 67P/Churyumov-Gerasimenko prior to the descent of the surface lander PHILAE. Astronomy and astrophysics, 618, A71. EDP Sciences 10.1051/0004-6361/201832883
