| article html file updated | 8 February 2020 17:22 CET | Update | https://www.mdpi.com/2079-3197/5/4/44 |
| article html file updated | 27 September 2019 10:20 CEST | Update | - |
| article html file updated | 2 May 2019 23:40 CEST | Update | - |
| article html file updated | 2 January 2018 16:55 CET | Update | - |
| article html file updated | 28 September 2017 11:14 CEST | Original file | - |
| article xml uploaded. | 28 September 2017 11:13 CEST | Original file | https://www.mdpi.com/2079-3197/5/4/44/xml |
| article pdf uploaded. | 28 September 2017 11:13 CEST | Version of Record | https://www.mdpi.com/2079-3197/5/4/44/pdf |
