 He attended Athens Polytechnic before entering MIT, where he received his Bachelor and Master of Science (1950), Mechanical Engineer (1954), and Doctorate of Science (1956).In 1965, he and Joseph Keenan published their textbook "Principles of General Thermodynamics", which restates the second law of thermodynamics in terms of the existence of stable equilibrium states.Their formulation of the second law of thermodynamics states that