| article html file updated | 8 February 2020 03:17 CET | Update | https://www.mdpi.com/2076-0787/6/2/20 |
| article html file updated | 4 May 2019 02:46 CEST | Update | - |
| article html file updated | 13 April 2017 05:07 CEST | Update | - |
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| article html file updated | 12 April 2017 07:28 CEST | Update | - |
| article html file updated | 12 April 2017 05:26 CEST | Update | - |
| article html file updated | 11 April 2017 12:52 CEST | Original file | - |
| article xml uploaded. | 11 April 2017 12:51 CEST | Original file | https://www.mdpi.com/2076-0787/6/2/20/xml |
| article pdf uploaded. | 11 April 2017 12:51 CEST | Updated version of record | https://www.mdpi.com/2076-0787/6/2/20/pdf |
| article pdf uploaded. | 10 April 2017 14:40 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/2/20/pdf-vor |
