Master of Science
Information and Systems Engineering
Barnes, Robert Featherstone
Chapter 1 of this paper contains the general theory of clumps, chapter 2 deals with three applications of this theory in associative information retrieval, and chapter 3 presents a procedure for computing clumps.
Heiser, Robert C., "Theoretical and computational aspects of clumps" (1970). Theses and Dissertations. 3810.