| article html file updated | 8 February 2020 04:30 CET | Update | https://www.mdpi.com/2077-0375/7/2/24 |
| article html file updated | 24 September 2019 12:52 CEST | Update | - |
| article html file updated | 4 May 2019 00:32 CEST | Update | - |
| article html file updated | 29 June 2017 11:37 CEST | Update | - |
| article html file updated | 27 April 2017 12:00 CEST | Original file | - |
| article xml uploaded. | 27 April 2017 11:58 CEST | Update | https://www.mdpi.com/2077-0375/7/2/24/xml |
| article pdf uploaded. | 27 April 2017 11:58 CEST | Version of Record | https://www.mdpi.com/2077-0375/7/2/24/pdf |
