F. Vogt, M. Dopita, L. Kewley, R. Sutherland, J. Scharwaechter, H. Basurah, A. Ali, and M. Amer. (2014)cite arxiv:1406.5186Comment: 21 pages, 15 figures, accepted for publication in ApJ. Due to size limitations, the supplementary STL file for the 3D-printable diagram is available here: http://www.mso.anu.edu.au/~fvogt/online_material.html.
O. Roos, S. Juneau, F. Bournaud, and J. Gabor. (2014)cite arxiv:1405.7971Comment: Main article: 14 pages, 13 figures; Appendix: 4 pages, 4 figures. Submitted to the Astrophysical Journal. Comments are welcome.