1. King, W.H., J.C. Kuck and V.L. Frampton, JAOCS 38:19–21 (1961).
2. King, W.H., and V.L. Frampton, U.S. Patent 2,950,198 (1960).
3. King, W.H., and V.L. Frampton, JAOCS 38:497–499 (1961).
4. King, W.H., and V.L. Frampton, U.S. Patent 3,025,314 (1962).
5. AOCS Official and Tentative Methods, Third Edition, Revised 1969, Method Ba 2-38.