1. F. Kohlrausch and L. Holborn, Das Leitvermögen der Elektrolyte, Teubner, Leipzig, 1898.
2. M.J. Relis, PhD Thesis, Massachusetts Institute of Technology, MA, 1947.
3. M.J. Relis, US Patent 2 542 057, 1951.
4. Two centuries of quantitative electrolytic conductivity