VizieR online Data Catalogue associated with article published in journal Astronomical Journal (AAS) with title 'An optical spectroscopic survey of the Serpens main cluster: evidence for two populations?' (bibcode: 2015AJ....149..103E)
Erickson, K. L. (Creator), Wilking, B. A. (Creator), Meyer, M. R. (Creator), Kim, J. S. (Creator), Sherry, W. (Creator), Freeman, M. (Creator) (2015). Spectroscopy of candidate YSOs in Serpens. Centre de Donnees Strasbourg (CDS). 10.26093/cds/vizier.51490103