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NIST, National Institute of Standards and Technology, U.S. Department of Commerce
NIST Temperature Scale Database (SRD 60), Version 3.0

ITS-90 References for Temperature Points:

Element: He
Year Reference Data with Ref.
2023 Ortiz Vega, D. , Hall, K. , Holste, J. , Harvey, A. and Lemmon, E., An Equation of State for the Thermodynamic Properties of Helium, NIST Internal Report (NISTIR) 8474, National Institute of Standards and Technology, Gaithersburg, MD, 2023. (DOI:)
2021 C. Gaiser and B. Fellmuth, Primary thermometry at 4 K, 14 K, and 25 K applying dielectric-constant gas thermometry, Metrologia 58, 042101 (2021). (DOI:)
2021 C. Pan, F. Sparasci, M. Plimmer, L. Risegari, J.-M. Daugas, G. Rouille, B. Gao, and L. Pitre, Direct comparison of ITS-90 and PLTS-2000 from 0.65 K to 1 K at LNE-CNAM, Metrologia 58, 025005 (2021). (DOI:)
2018 Lemmon, E.W., Bell, I.H., Huber, M.L., McLinden, M.O. NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 10.0, National Institute of Standards and Technology, Standard Reference Data Program, Gaithersburg, 2018. (No DOI)
2017 Henning F., Wensel H. T., The Freezing Point of Iridium, J. Res. Natl. Bur. Stand., 1933, 10, 809-821. (DOI:)
2017 T. Nakano, T. Shimazaki, and O. Tamura, Reproducibility of the Helium-3 Constant-Volume Gas Thermometry and New Data Down to 1.9 K at NMIJ/AIST, Int. J. Thermophys. 38, 105 (2017). (DOI:)
2007 Engert, J., B. Fellmuth, and K. Jousten, A new He-3 vapour-pressure based temperature scale from 0.65 K to 3.2 K consistent with the PLTS-2000, Metrologia 44 (1), 40-52 (2007). (DOI:)
2006 Rusby, R. L., D. Head, C. Meyer, W. Tew, O. Tamura, K. D. Hill, M. de Groot, A. Storm, A. Peruzzi, and B. Fellmuth, Final Report on CCT-K1: Realizations of the ITS-90, 0.65 K to 24.5561 K, using rhodium iron resistance thermometers, Metrologia 43, ssue 1A, 03002 (2006). (DOI:)
2002 R. L. Rusby, M. Durieux, A. L. Reesink, R. P. Hudson, G. Schuster, M. Kühne, W. E. Fogle, R. J. Soulen, and E. D. Adams, The Provisional Low Temperature Scale from 0.9 mK to 1 K, PLTS-2000, J. Low Temp. (DOI:)
1996 Bedford, RE; Bonnier, G; Maas, H; Pavese, F, Recommended values of temperature on the International Temperature Scale of 1990 for a selected set of secondary reference points, Metrologia, 33 (1996) 133-154. (DOI:)
1990 H. Preston-Thomas, The International Temperature Scale of 1990 (ITS-90), Metrologia 27 (1990) 3 (DOI:)
1990 McCarty, R.D. and Arp, V.D., "A New Wide Range Equation of State for Helium," Adv. Cryo. Eng., 35:1465-1475, 1990. (No DOI)
1986 R. C. Kemp, W. R. G. Kemp, L. M. Besley, Metrologia 23 (1986) 61-86. A determination of thermodynamic temperatures and measurements of the second virial coefficient of 4He between 13.81 K and 287 K using a constant-volume gas thermometer (DOI:)
1980 Rusby R. L., Swenson C. A., A New Determination of the Helium Vapour Pressure Scales Using a CMN Magnetic Thermometer and the NPL-75 Gas Thermometer Scale, Metrologia, 1980, 16, 73-87. (DOI:)