1. A. Eucken, Verh. Dtsch. Phys. Ges. 18, 4 (1916)
2. H.J. Hoge, J. Res. Natl. Bur. Stand. 44, 321 (1950)
3. M.P. Orlova, in Temperature, Its Measurement and Control in Science and Industry, vol. 3, ed. by C.M. Herzfeld (Reinhold, New York, 1962), pp. 179–184
4. R. Muijlwijk, M. Durieux, H. van Dijk, Physica 43, 475 (1969)
5. W.R.G. Kemp, C.P. Pickup, in Temperature, Its Measurement and Control in Science and Industry, vol. 4, ed. by H.H. Plumb (Instrument Society of America, Pittsburgh, 1972). pp. 217–224