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Portico
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Preserved
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2026-02-12
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Preserved : 2011: 1(1), 2012: 2(1), 2013: 3(1), 2014: 4(1-3), 2015: 5(1-3), 2016: 6(1-3), 2017: 7(1-3), 2018: 8(1-2)
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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1); 2 (, 1); 3 (, 1); 4 (, 1 to 3); 5 (, 1 to 3); 7 (, 2, 3); 8; 2011; 2012; 2013; 2014; 2015; 2017; 2018
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Swiss National Library
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Preserved
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2020-01-08
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1; 2 (1); 3 (1); 4 (1 to 3); 5 (1, 2); 6 (1 to 3); 7 (1 to 3); 8 (1, 2)
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