| article html file updated | 8 February 2020 05:57 CET | Update | https://www.mdpi.com/2073-4468/6/2/7 |
| article html file updated | 24 September 2019 20:22 CEST | Update | N/A |
| article html file updated | 3 May 2019 21:53 CEST | Update | N/A |
| article html file updated | 28 June 2017 12:28 CEST | Update | N/A |
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| article html file updated | 16 May 2017 11:10 CEST | Original file | N/A |
| article xml uploaded. | 16 May 2017 11:09 CEST | Update | https://www.mdpi.com/2073-4468/6/2/7/xml |
| article pdf uploaded. | 16 May 2017 11:09 CEST | Version of Record | https://www.mdpi.com/2073-4468/6/2/7/pdf |
