Optimization of feature space in tasks of classification and clustering of texts of various types / A. Polikarpov, O. Kukushkina, V. Poddubnyj, O. Shevelyov // Text and language : structures, functions, interrelations : International Quantitative Linguistics Conference Qualico, Graz, Austria, 17-20 september 2009 : (Abstracts). Graz, 2009. P. 47-49. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000427962