Discovering young stars in the Gum 31 region with infrared observationsH. Ohlendorf, T. Preibisch, B. Gaczkowski, T. Ratzka, J. Ngoumou, V. Roccatagliata and R. GrellmannA&A, 552 (2013) A14DOI: https://doi.org/10.1051/0004-6361/201220218