| article html file updated | 7 February 2020 09:24 CET | Update | https://www.mdpi.com/2076-0787/5/2/34 |
| article html file updated | 5 May 2019 14:27 CEST | Update | - |
| article html file updated | 27 March 2019 05:58 CET | Update | - |
| article html file updated | 30 May 2016 10:19 CEST | Update | - |
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| article html file updated | 27 May 2016 23:39 CEST | Update | - |
| article html file updated | 27 May 2016 14:50 CEST | Original file | - |
| article xml uploaded. | 27 May 2016 14:49 CEST | Original file | https://www.mdpi.com/2076-0787/5/2/34/xml |
| article pdf uploaded. | 27 May 2016 14:49 CEST | Version of Record | https://www.mdpi.com/2076-0787/5/2/34/pdf |
