| article html file updated | 31 August 2025 05:33 CEST | Update | https://www.mdpi.com/2227-9032/7/4/156 |
| article html file updated | 19 July 2022 22:41 CEST | Update | - |
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| article html file updated | 30 December 2019 09:58 CET | Update | - |
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| article pdf uploaded. | 19 December 2019 04:13 CET | Updated version of record | https://www.mdpi.com/2227-9032/7/4/156/pdf |
| article xml uploaded. | 19 December 2019 04:13 CET | Update | https://www.mdpi.com/2227-9032/7/4/156/xml |
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| article pdf uploaded. | 2 December 2019 14:19 CET | Version of Record | https://www.mdpi.com/2227-9032/7/4/156/pdf-vor |
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