A Decision Theory Approach to Optimal Automatic Indexing. Knorz, G In Research and Development in Information Retrieval, pages 174–193, Heidelberg et al., 1983. Springer.
bibtex   
@inproceedings{Knorz:83c,
	address = {Heidelberg et al.},
	title = {A {Decision} {Theory} {Approach} to {Optimal} {Automatic} {Indexing}},
	booktitle = {Research and {Development} in {Information} {Retrieval}},
	publisher = {Springer},
	author = {Knorz, G},
	year = {1983},
	pages = {174--193},
}

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