| article html file updated | 7 February 2020 05:31 CET | Update | https://www.mdpi.com/2077-1312/4/1/23 |
| article html file updated | 5 May 2019 22:17 CEST | Update | - |
| article html file updated | 26 March 2019 22:42 CET | Update | - |
| article html file updated | 27 October 2017 11:16 CEST | Original file | - |
| article pdf uploaded. | 7 March 2016 13:50 CET | Version of Record | https://www.mdpi.com/2077-1312/4/1/23/pdf |
| article xml uploaded. | 7 March 2016 13:50 CET | Original file | https://www.mdpi.com/2077-1312/4/1/23/xml |
