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Author: Zajíček, Luděk

• Zajíček, Luděk: On approximate Dini derivates and one-sided approximate derivatives of arbitrary functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 3, pp. 549-560
• Zajíček, Luděk: On the symmetry of Dini derivates of arbitrary functions. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 22 (1981), issue 1, pp. 195-209