| article html file updated | 8 February 2020 20:00 CET | Update | https://www.mdpi.com/2079-4983/8/4/48 |
| article html file updated | 28 September 2019 03:42 CEST | Update | N/A |
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| article xml uploaded. | 1 November 2017 09:04 CET | Update | https://www.mdpi.com/2079-4983/8/4/48/xml |
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| article pdf uploaded. | 1 November 2017 09:04 CET | Version of Record | https://www.mdpi.com/2079-4983/8/4/48/pdf |