1. Experiments on spin temperatures;Abragam;Physics Review,1957
2. Spin temperature;Abragam;Physics Review,1958
3. Physics of negative absolute temperatures;Abrahm;Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics,2017
4. Reduction and renormalization;Batterman,2010
5. Proof of Carathéodory’s local theorem and its global application to thermostatics;Bernstein;Journal of Mathematics and Physics,1960