| article html file updated | 8 February 2020 02:49 CET | Update | https://www.mdpi.com/2079-3197/5/2/20 |
| article html file updated | 24 September 2019 03:33 CEST | Update | - |
| article html file updated | 4 May 2019 03:46 CEST | Update | - |
| article html file updated | 28 June 2017 12:56 CEST | Update | - |
| article html file updated | 6 April 2017 09:10 CEST | Original file | - |
| article xml uploaded. | 6 April 2017 09:09 CEST | Original file | https://www.mdpi.com/2079-3197/5/2/20/xml |
| article pdf uploaded. | 6 April 2017 09:09 CEST | Updated version of record | https://www.mdpi.com/2079-3197/5/2/20/pdf |
| article pdf uploaded. | 3 April 2017 10:30 CEST | Version of Record | https://www.mdpi.com/2079-3197/5/2/20/pdf-vor |
