1. Errico, A., “Paint Varnish Production,” private communication: there are at least seven drying-time instruments (1959).
2. Hilditch, T. P., J.O.C.C.A.,31 (1948).
3. Greaves, J. H., Oil & Colour Trade Journal,113 (April 1948).
4. Mills, M. R., “An Introduction to Drying Oil Technology,” 1st ed., vol. 1, pp. 3–13, Pergamon Press Ltd., London, 1952.
5. Mueller, E. R., “Paper H12, A.C.S. Division of Paint, Plastics, and Printing Ink Chemistry.”