| article html file updated | 9 February 2020 02:07 CET | Update | https://www.mdpi.com/2413-8851/2/1/3 |
| article html file updated | 2 May 2019 04:12 CEST | Update | - |
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| article html file updated | 28 March 2019 13:22 CET | Update | - |
| article html file updated | 5 January 2018 14:48 CET | Original file | - |
| article xml uploaded. | 5 January 2018 14:47 CET | Original file | https://www.mdpi.com/2413-8851/2/1/3/xml |
| article pdf uploaded. | 5 January 2018 14:47 CET | Version of Record | https://www.mdpi.com/2413-8851/2/1/3/pdf |
