1) J.L. Gardner: Computer Modelling of a Multi-Wavelength Pyrometer for Measuring True Surface Temperature, High Temperatures-High Pressures, 12-6, 699/705 (1980)
2) J.L. Gardner, T.P. Jones and M.R. Davis: A Six-Wavelength Radiation Pyrometer, High Temperatures-High Pressures, 13-4, 459/466 (1981)