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@article{10_4064_fm_89_1_5_11, author = {Hans Carstens}, title = {Reducing hyperarithmetic sequences}, journal = {Fundamenta Mathematicae}, pages = {5--11}, publisher = {mathdoc}, volume = {89}, number = {1}, year = {1975}, doi = {10.4064/fm-89-1-5-11}, language = {en}, url = {https://geodesic-test.mathdoc.fr/articles/10.4064/fm-89-1-5-11/} }
Hans Carstens. Reducing hyperarithmetic sequences. Fundamenta Mathematicae, Tome 89 (1975) no. 1, pp. 5-11. doi : 10.4064/fm-89-1-5-11. https://geodesic-test.mathdoc.fr/articles/10.4064/fm-89-1-5-11/
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