| article html file updated | 9 February 2020 02:21 CET | Update | https://www.mdpi.com/1999-5903/10/1/6 |
| article html file updated | 29 September 2019 18:10 CEST | Update | - |
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| article html file updated | 1 February 2018 13:16 CET | Update | - |
| article html file updated | 9 January 2018 04:16 CET | Update | - |
| article html file updated | 9 January 2018 04:15 CET | Original file | - |
| article xml uploaded. | 9 January 2018 04:14 CET | Update | https://www.mdpi.com/1999-5903/10/1/6/xml |
| article pdf uploaded. | 8 January 2018 14:17 CET | Version of Record | https://www.mdpi.com/1999-5903/10/1/6/pdf |
