A few references are missing, sorry about that here they are:

" ...make any prediction and control extremely challenging (5, 6)."
5. S. S. L. Peppin, J. A. W. Elliot, M. G. Worster, Journal of Fluid Mechanics 554, 147 (2006).
6. S. S. L. Peppin, J. S. Wettlaufer, M. G. Worster, Physical Review Letters 100, 238301 (2008).

"...the influence of additives have so far been exclusively empirical (7-10)"
7. E. Munch, E. Saiz, A. P. Tomsia, S. Deville, Journal of the American Ceramic Society 92, 1534 (2009).
8. K. H. Zuo, Y.-P. Zeng, D. Jiang, Materials Science and Engineering C 30, 283 (2010).
9. Y.-H. Koh et al., Journal of the American Ceramic Society 89, 3646 (2006).
10. C. M. Pekor, P. Kisa, I. Nettleship, Journal of the American Ceramic Society 91, 3185 (2008).

"...it is mostly investigated for its stabilization properties of suspensions (16-18). "
16. O. Sakurada, Y. Nakanishi, M. Hashiba, Journal of Materials Science Letters 20, 929 (2001).
17. Journal of Nanoscience and Nanotechnology 9, 662 (2009).
18. O. Sakurada, M. Hashiba, N. O. a. H. K. Yasuhiro Iwasawa, in Studies in Surface Science and Catalysis. (Elsevier, 2001), vol. Volume 132, pp. 375-378.

"...Ice exhibits an isoelectric point, in the range 3-4.6 (20, 21)"
20. J. Drzymala, Z. Sadowski, L. Holysz, E. Chibowski, Journal of Colloid and Interface Science 220, 229 (1999).
21. N. Kallay, D. Cakara, Journal of Colloid and Interface Science 232, 81 (2000).