Prisinzano, L., Micela, G., Flaccomio, E., Stauffer, J. R., Megeath, T., Rebull, L., Robberto, M., Smith, K., Feigelson, E. D., Grosso, N., and Wolk, S. 2008. "X-Ray Properties of Protostars in the Orion Nebula." The Astrophysical Journal, 677 401–424. https://doi.org/10.1086/528842.