| article html file updated | 15 August 2026 07:24 CEST | Update | https://www.mdpi.com/2227-7390/6/9/168 |
| article html file updated | 10 February 2020 10:48 CET | Update | N/A |
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| article xml uploaded. | 13 September 2018 14:12 CEST | Update | https://www.mdpi.com/2227-7390/6/9/168/xml |
| article pdf uploaded. | 13 September 2018 14:12 CEST | Updated version of record | https://www.mdpi.com/2227-7390/6/9/168/pdf |
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