(3) Its heating and cooling must be monotonic.Landsberg, P.T. (1961). Thermodynamics with Quantum Statistical Illustrations, Interscience Publishers, New York, page 17. That is to say, throughout the range of temperatures for which it is intended to work,
(3) Its heating and cooling must be monotonicLandsberg PT (1961) Thermodynamics with Quantum Statistical Illustrations Interscience Publishers New York page 17 That is to say throughout the range of temperatures for which it is intended to work