| article html file updated | 7 February 2020 22:27 CET | Update | https://www.mdpi.com/2079-3197/5/1/9 |
| article html file updated | 23 September 2019 02:48 CEST | Update | - |
| article html file updated | 4 May 2019 13:09 CEST | Update | - |
| article html file updated | 29 March 2017 08:46 CEST | Update | - |
| article html file updated | 8 February 2017 11:21 CET | Original file | - |
| article xml uploaded. | 8 February 2017 10:58 CET | Original file | https://www.mdpi.com/2079-3197/5/1/9/xml |
| article pdf uploaded. | 8 February 2017 10:58 CET | Updated version of record | https://www.mdpi.com/2079-3197/5/1/9/pdf |
| article pdf uploaded. | 29 January 2017 04:52 CET | Version of Record | https://www.mdpi.com/2079-3197/5/1/9/pdf-vor |
