Weiner, Joan. Frege in perspective / Joan Weiner . - Ithaca : London : Cornell University Press, 1990 . - xv, 307 p. 23 cm. К.: Бібліогр. : c. 299-302, Index ISBN: 0-8014-2115-5 Subjects--Personal Names: Frege, Gottlob 1848-1925