K. Sokal, K. Johnson, P. Massey, and R. Indebetouw. (2015)cite arxiv:1508.00572Comment: To appear in the conference proceedings of the June 2015 Potsdam Wolf-Rayet workshop, edited by W.-R. Hamann, A. Sander, and H. Todt. 3 pages, 3 figures.
G. Blanc, L. Kewley, F. Vogt, and M. Dopita. (2014)cite arxiv:1410.8146Comment: 23 pages, 9 figures, Accepted for publication in The Astrophysical Journal (Oct 28 2014).