http://mathworld.i2p/KMSCondition.html
RIMS, Kyoto Univ. Ser. A 4 , 373-385, 1968. Cohen, J. S.; Dani ë ls, H. A. M.; and Winnink, M. " On Generalizations of the KMS-Boundary Condition. " Commun. Math. Phys. 84 , 449-458, 1982. Derez ń ski, J. and Pillet, C. " KMS States. " http://pillet.univ-tln.fr/data/pdf/KMS-states.pdf .