| article html file updated | 9 February 2020 01:51 CET | Update | https://www.mdpi.com/1999-5903/10/1/4 |
| article html file updated | 29 September 2019 15:27 CEST | Update | - |
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| article html file updated | 1 February 2018 13:15 CET | Update | - |
| article html file updated | 3 January 2018 09:18 CET | Original file | - |
| article xml uploaded. | 3 January 2018 09:16 CET | Update | https://www.mdpi.com/1999-5903/10/1/4/xml |
| article pdf uploaded. | 3 January 2018 09:16 CET | Version of Record | https://www.mdpi.com/1999-5903/10/1/4/pdf |
