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:)
Fellmuth B., Temperature Fixed-Points using High-purity Superconductors, in Temperature, Its Measurement and Control in Science and Industry (TMCSI), 1992, 6, 233-238.
(No DOI)
Li Zhiran, Xia Yongjian, Huang Shuangkai, The Study of Superconductive Transition Temperatures for Thermometric Fixed Points, in Temperature, Its Measurement and Control in Science and Industry (TMCSI), 1992, 6, 239-242.
(No DOI)
McLaren E. H., Murdock E. G., The Freezing Points of High-Purity Metals as Precision Temperature Standards. VII. Thermal Analyses on Seven Samples of Bismuth, Can. J. Phys., 1963, 41, 95-112. (DOI:)
McLaren E. H., Murdock E. G., The Freezing Points of High Purity Metals as Precision Temperature Standards. VI. Thermal Analyses on Five Samples of Lead with Purities Greater than 99.999+%, Can. J. Phys., 1960, 38, 577-587. (DOI:)