R. Abraham, P. van Dokkum, C. Conroy, A. Merritt, J. Zhang, D. Lokhorst, S. Danieli, and L. Mowla. (2016)cite arxiv:1612.06415Comment: 27 pages, 10 figures, Invited review, Book chapter in Öutskirts of Galaxies", Eds. J. H. Knapen, J. C. Lee and A. Gil de Paz, Astrophysics and Space Science Library, Springer, in press.
R. Cen, and M. Safarzadeh. (2016)cite arxiv:1609.03583Comment: 20 pages, 8 figures, 3 tables, all comments/suggestions welcome. arXiv admin note: text overlap with arXiv:1304.3466.