| article html file updated | 8 February 2020 17:35 CET | Update | https://www.mdpi.com/2079-6374/7/4/44 |
| article html file updated | 27 September 2019 11:46 CEST | Update | - |
| article html file updated | 2 May 2019 23:10 CEST | Update | - |
| article html file updated | 2 January 2018 12:24 CET | Update | - |
| article html file updated | 30 September 2017 16:02 CEST | Original file | - |
| article xml uploaded. | 30 September 2017 12:58 CEST | Original file | https://www.mdpi.com/2079-6374/7/4/44/xml |
| article pdf uploaded. | 30 September 2017 12:58 CEST | Version of Record | https://www.mdpi.com/2079-6374/7/4/44/pdf |
