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Author: Hájková, Marie

• Hájková, Marie: The lattice of bi-numerations of arithmetic. I. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 12 (1971), issue 1, pp. 81-104
• Hájková, Marie: The lattice of bi-numerations of arithmetic. II. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 12 (1971), issue 2, pp. 281-306