New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools - II. SDSS DR7 vs. UKIDSS LAS DR6, SDSS DR7 vs. UKIDSS LAS DR8, SDSS DR9 vs. UKIDSS LAS DR10, and SDSS DR7 vs. 2MASS
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A&A, 598 (2017) A92
Published online: 07 February 2017
DOI: 10.1051/0004-6361/201629410