| article html file updated | 15 August 2026 12:43 CEST | Update | https://www.mdpi.com/2077-1312/6/4/156 |
| article html file updated | 11 February 2020 03:01 CET | Update | N/A |
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| article pdf uploaded. | 13 December 2018 12:14 CET | Version of Record | https://www.mdpi.com/2077-1312/6/4/156/pdf |
| article xml uploaded. | 13 December 2018 12:14 CET | Update | https://www.mdpi.com/2077-1312/6/4/156/xml |
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