Bernard Bolzano (October 5, 1781 - December 18, 1848)
(English).
In:
Jarník, Vojtěch; Novák, Josef (other); Folta, Jaroslav (other); Jarník, Jiří (other): Bolzano and the Foundations of Mathematical Analysis.
(English).
Praha:
Society of Czechoslovak Mathematicians and Physicists,
1981.
pp. 82-86
