Fleming AD, Philip S, Goatman KA, Sharp PF, Olson JA. Automated clarity assessment of retinal images using regionally based structural and statistical measures. Med Eng Phys. 2012 Sep 1;34(7):849-59. doi: 10.1016/j.medengphy.2011.09.027
Knox D, Gibson L, Zusman ME, Gallmeier C. Why college students end relationships. Coll Stud J. 1997 Jan 1;31(4):449-52.