Tepping, Benjamin J. (1968) "A Model for Optimum Linkage of Records," Journal of the American Statistical Association, December 1968, 63, pp. 1321-1332 in Record Linkage Techniques — 1985, Department of the Treasury Internal Revenue Service Statistics of Income Division, December 1985, Pub. 1299 (2-86), pp. 39-50. [Link to working paper no. 1367 section 1]