Fluorine-containing heterocycles. XVII. (Tetrafluorobrnzoyl)thioureas in the synthesis of fluorine-containing azaheterocycles [Electronic resource] / G. N. Lipunova, E. V. Nosova, A. A. Laeva, T. V. Trashakhova, P. A. Slepukhin, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2008. - Vol. 44, № 5. - P. 741-749. - URL: http://www.springerlink.com/content/r144741145601511/fulltext.pdf. - (Дата обращения: 28.10.2011 г.)