1. Gibbs, J.W. (1873) Transactions of the Connecticut Academy of Arts and Sciences, 2, 309-342.
2. van der Waals, J.D. (1873) On the Continuity of the Gaseous and Liquid States. Ph.D. Thesis, University of Leiden, Leiden. (In Dutch)
3. Historical Observations on Laws of Thermodynamics
4. Gibbs, J.W. (1878) Transactions of the Connecticut Academy of Arts and Sciences, 3, 343-524.
5. The Limit of the Liquid State of Matter