| article html file updated | 15 August 2026 02:43 CEST | Update | https://www.mdpi.com/1424-8220/18/6/1821 |
| article html file updated | 9 February 2020 20:16 CET | Update | N/A |
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| article html file updated | 5 June 2018 07:00 CEST | Original file | N/A |
| article pdf uploaded. | 5 June 2018 06:59 CEST | Version of Record | https://www.mdpi.com/1424-8220/18/6/1821/pdf |
| article xml uploaded. | 5 June 2018 06:59 CEST | Update | https://www.mdpi.com/1424-8220/18/6/1821/xml |
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