Kepler, J. (1611) Strena seu de nive sexangula. ["New Year's gift or about the hexangular snow", in Latin, probably the first description of the hexagonal symmetry of snow crystals]

Dobrowolski (1916) Ark. Kemi: 6(7).

Mügge (1918) Centralblatt für Mineralogie: 187.

Adams (1930) Royal Society of London, Proceedings: 128: 588.

Bernal, J.D., Fowler, R.H. (1933) A theory of water and ionic solution, with particular reference to hydrogen and hydroxyl ions. Journal of Chemical Physics: 1(8): 515-548.

Blackwelder, E. (1939) The hardness of ice. American Journal of Science: 238: 61-62.

Palache, C., Berman, H., Frondel, C. (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 494-498.

Hall, D., Wood, M.K. (1985) A molecular-packing analysis of the crystal structures of ice. Acta Crystallographica: 41: 169-172.

Aoki, K., Yamawaki, H., Sakashita, M., Fujihisa, S. (1996) Infrared absorption study of the hydrogen-bond symmetrization in ice to 110 GPa. Physical Review B: 54: 15673-15677.

Goncharov, A.F., Struzhkin, V.V., Somayazulu, M.S., Hemley, R.J., Mao, H.K. (1996) Compression of ice to 210 gigapascals: Infrared evidence for s symmetric hydrogen-bonded phase. Science: 273-218-220.

Wolanin, E., Pruzan, P., Chervin, J.C., Canny, B., Gauthier, M., Hausermann, D., Hanfland, M. (1997) Equation of state of ice VII up to 106GPa. Physical Review B: 56: 5781-5785.

Hill, L. et al. (2004) Experiments on Ice Spikes and a Simple Growth Model. Journal of Glaciology, 50, 375-381.

www.its.caltech.edu

Cabot, N.L., Ernst, C.M., Denevi, B.W., Nair, H., Deutsch, A.N., Blewett, D.T., Murchie, S.L., Neumann, G.A., Mazarico, E., Paige, D.A., Harmon, J.K., Head, J.W., Solomon, S.C. (2014): Images of surface volatiles in Mercury's polar craters acquired by the MESSENGER spacecraft. Geology: 42(12): 1051-1054; http://dx.doi.org/10.1130/G35916.1

Eckert, J., Gourdon, O., Jacob, D.E., Meral, C., Monteiro, P.J.M., Vogel, S.C., Wirth, R., Wenk, H.-R. (2015) Ordering of water in opals with different microstructures. European Journal of Mineralogy: 27: 203-213.

Filacchione, G., De Sanctis, M.C., Capaccioni, F., Raponi, A., Tosi, F., Ciarniello, M., Cerroni, P., Piccioni, G., Capria, M.T., Palomba, E., Bellucci, G., Erard, S., Bockelee-Morvan, D., Leyrat, C., Arnold, G., Barucci, M.A., Fulchignoni, M., Schmitt, B., Quirico, E., Jaumann, R., Stephan, K., Longobardo, A., Mennella, V., Migliorini, A., Ammannito, A., Benkhoff, J., Bibring, J.P., Blanco, A., Blecka, M.I., Carlson, R., Carsenty, U., Colangeli, L., Combes, M., Combi, M., Crovisier, J., Drossart, P., Encrenaz, T., Federico, C., Fink, U., Fonti, S., Irwin, W.H.Ip.P., Kuehrt, E., Langevin, Y., Magni, G., McCord, T., Moroz, L., Mottola, S., Orofino, V., Schade, U., Taylor, F., Tiphene, D., Tozzi, G.P., Beck, P., Biver, N., Bonal, L., Combe, J.-Ph., Despan, D., Flamini, E., Formisano, M., Fornasier, S., Frigeri, A., Grassi, D., Gudipati, M.S., Kappel, D., Mancarella, F., Markus, K., Merlin, F., Orosei, R., Rinaldi, G., Cartacci, M., Cicchetti, A., Giuppi, S., Hello, Y., Henry, F., Jacquinod, S., Reess, J.M., Noschese, R., Politi, R., Peter, G. (2016): Exposed water ice on the nucleus of comet 67P/Churyumov–Gerasimenko. Nature: 529: 368-372; http://phys.org/news/2016-01-ice-surface-comet-67p.html doi:10.1038/nature16190