Small, C. and Douglas, P. and Johnson, Roger and King, P.J.H. and Martin, G.N., eds. (1997) Advances in databases: 15th British national conference on databases. Lecture Notes in Computer Science 1271. Springer. ISBN 9783540632638.

King, P.J.H. and Johnson, R.G. (1974) Comments on the algorithms of Verhelst for the conversion of limited-entry decision tables to flowcharts. Communications of the ACM 17 (1), pp. 43-45. ISSN 0001-0782.

King, P.J.H. and Johnson, Roger (1973) Some comments on the use of ambiguous decision tables and their conversion to computer programs. Communications of the ACM 16 (5), pp. 287-290. ISSN 0001-0782.