| article html file updated | 7 February 2020 22:00 CET | Update | https://www.mdpi.com/2079-6374/7/1/8 |
| article html file updated | 23 September 2019 00:22 CEST | Update | - |
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| article html file updated | 30 March 2017 05:26 CEST | Update | - |
| article html file updated | 22 January 2017 12:17 CET | Original file | - |
| article xml uploaded. | 22 January 2017 12:16 CET | Original file | https://www.mdpi.com/2079-6374/7/1/8/xml |
| article pdf uploaded. | 22 January 2017 12:16 CET | Version of Record | https://www.mdpi.com/2079-6374/7/1/8/pdf |
