France, K., Schindhelm, E., Burgh, E. B., Herczeg, G. J., Harper, G. M., Brown, A., et al. (2011). The far-ultraviolet "Continuum" in protoplanetary disk systems - II. Carbon monoxide fourth positive emission and absorption. The Astrophysical Journal, 734(1): 31, pp. 1-11. doi:10.1088/0004-637X/734/1/31.