Müller, Ingo (1971). "Die Kältefunktion, eine universelle Funktion in der Thermodynamik wärmeleitender Flüssigkeiten" [The cold function, a universal function in the thermodynamics of heat-conducting liquids]. Archive for Rational Mechanics and Analysis. 40: 1–36. doi:10.1007/BF00281528.
Müller, Ingo (1971). "The Coldness, a Universal Function in Thermoelastic Bodies". Archive for Rational Mechanics and Analysis. 41 (5): 319–332. Bibcode:1971ArRMA..41..319M. doi:10.1007/BF00281870.
Müller, Ingo (1971). "The Coldness, a Universal Function in Thermoelastic Bodies". Archive for Rational Mechanics and Analysis. 41 (5): 319–332. Bibcode:1971ArRMA..41..319M. doi:10.1007/BF00281870.