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"Julius Petersen 1839-1910 a biography."
Jesper Lützen, Gert Sabidussi, Bjarne Toft (1992)
- Jesper Lützen, Gert Sabidussi, Bjarne Toft:
Julius Petersen 1839-1910 a biography. Discret. Math. 100(1-3): 9-82 (1992)
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