* X-ray studies of SMGs [#sfe0b39d] - Laird et al. 2009, MNRAS -- X-ray properties of 35 SMGs in the Chandra Deep Field North (GOODS-N) - Lutz et al. 2010?, -- 0.87mm properties of X-ray selected objects in ECDF-S * NIR properties [#u137cb41] - Dannerbauer et al. 2004 -- The Faint Counterparts of MAMBO Millimeter Sources near the New Technology Telescope Deep Field -- K-band blank MAMBO sources -- http://adsabs.harvard.edu/abs/2004ApJ...606..664D - Wang et al. 2009 -- Ultradeep Near-Infrared Observations of Goods 850-5 -- radio faint, K-band dark SMG -- http://adsabs.harvard.edu/abs/2009ApJ...690..319W