1. Two Kinds of Power;Wilson,1968
2. On selecting a measure of retrieval effectiveness;Cooper;J. Am. Soc. Inform. Sci.,1973
3. Opening the black box of “relevance”;Cuadra;J. Docum.,1967
4. A definition of relevance for information retrieval;Cooper;Inform. Stor. Retr.,1971
5. A Treatise on Probability;Keynes,1921