Hubert, Lawrence; Arabie, Phipps Comparing partitions. (English) Zbl 0587.62128 Classification as a tool of research, Proc. 9th Annu. Meet. Classif. Soc. F.R.G., Karlsruhe/Ger. 1985, 209-215 (1986). MSC: 62H30 62H17 62H20 PDF BibTeX XML OpenURL
Johnstone, Peter T.; Wraith, Gavin C. Algebraic theories in toposes. (English) Zbl 0392.18006 Indexed Categ. Appl., Lect. Notes Math. 661, 141-242 (1978). MSC: 18B25 03G30 08C05 18C10 18F20 PDF BibTeX XML OpenURL