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2. Structure formation and the morphology diagram of possible structures in two-dimensional diffusional growth
3. W.W. Mullins, R.F. Sekerka, J. Appl. Phys. 34 (1963) 323; J. Appl. Phys. 35 (1964) 444.
4. P. Meakin, in: C. Domb, J.L. Lebowitz (Eds.), Phase Transitions and Critical Phenomena, vol. 12, Academic, New York, 1988.
5. The literature on phase-field models is vast by now. An entry into the more mathematically oriented literature can be got from P.W. Bates, P.C. Fife, R.A. Gardner, C.K.R.T. Jones, Physica D 104 (1997) 1.