Spitzer/IRAC view of Sh 2-284 - Searching for evidence of triggered star formation in an isolated region in the outer Milky WayE. Puga, S. Hony, C. Neiner, A. Lenorzer, A.-M. Hubert, L. B. F. M. Waters, F. Cusano and V. RipepiA&A, 503 1 (2009) 107-119DOI: https://doi.org/10.1051/0004-6361/200810664