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3. Gibbs J.W., Collected Works, Longmans Green, New York (1928);
4. Gibbs J.W., Dover reprint, New York, 1961. (The original formed part of a lengthy paper, “On the equilibrium of heterogeneous substances”, appearing in several issues of Trans. Connecticut Acad. Sci.)
5. Van der Waals J.D., Thesis, Over de Continuiteit van den Gasen, Vloiestoftoestand, Leiden, 1873.