New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools - I. UKIDSS LAS DR5 vs. SDSS DR7N. Lodieu, M. Espinoza Contreras, M. R. Zapatero Osorio, E. Solano, M. Aberasturi and E. L. MartínA&A, 542 (2012) A105DOI: https://doi.org/10.1051/0004-6361/201118717
