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Swiss National Library
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Preserved
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2020-01-08
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1 (1, 2); 3 (1, 2); 4 (1, 2); 5 (1 to 4); 6 (2, 3)
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Scholars Portal
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Preserved
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2026-03-19
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Preserved : 1 (2); 2 (1, 2); 3 (1, 2); 4 (1, 2); 5 (3); 6 (1); 7 (3); 8 (4); 9 (1 to 4); 10 (1 to 4); 11 (2 to 4); 12 (1, 2, 4)
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Portico
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Preserved
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2026-04-09
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Preserved : 2014: 1(1-2), 2015: 2(1-2), 2016: 3(1-2), 2017: 4(1-2), 2018: 5(1-4), 2019: 6(1-4), 2020: 7(1, 3-4), 2021: 8(1-4), 2022: 9(1-4), 2023: 10(1-4), 2024: 11(1-4), 2025: 12(1-4)
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