Detection of an excessively strong 3-μm absorption near the lunar highland crater Dufay C. Wöhler, A. Grumpe, M. Bhatt, A. A. Berezhnoy, V. V. Shevchenko and A. Bhardwaj A&A, 630 (2019) L7 Published online: 02 October 2019 DOI: 10.1051/0004-6361/201935927