| article html file updated | 8 February 2020 04:51 CET | Update | https://www.mdpi.com/2077-1312/5/2/20 |
| article html file updated | 24 September 2019 14:46 CEST | Update | - |
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| article html file updated | 27 October 2017 11:00 CEST | Update | - |
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| article xml uploaded. | 2 May 2017 11:54 CEST | Update | https://www.mdpi.com/2077-1312/5/2/20/xml |
| article pdf uploaded. | 2 May 2017 11:54 CEST | Version of Record | https://www.mdpi.com/2077-1312/5/2/20/pdf |
