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4. V. G. Osmolovskii, “Quasistationary problem on the interface evolution in the phase transition theory of continuum mechanics” [in Russian], Probl. Mat. Anal. 73, 115–123 (2013); English transl.: J. Math. Sci., New York 196, No. 3, 377–387 (2014).
5. E. Giusti, Minimal Surfaces and Functions of Bounded Variation, Birkhäuser, Boston (1984).