1. CT. Abraham, S. P. Ghosh, and D. K. Ray-Chaudhuri, File organization schemes based on finite geometries, Information and Control 12, 143–163 (1968).
2. G. Berman, The application of difference sets to the design of a balanced multiple-valued filing scheme, Information and Control 32, 128–138 (1976).
3. G. Berman, Combinatorial multiple-valued filing systems for multiattribute queries, Information and Control 36, 119–132 (1978).
4. R. C. Bose, C. T. Abraham, and S. P. Ghosh, File organization of records with multiple-valued attributes for multi-attributes queries, in: “Combinatorial Mathematics and Its Applications”, University of North Carolina Press, Chapel Hill, N.C., pp.277–297 (1969).
5. R. C. Bose and G. G. Koch, The design of combinatorial information retrieval systems for files with multiple-valued attributes, SIAM J. Appl. Math. 17, 1203–1214 (1969).