| article html file updated | 7 February 2020 05:17 CET | Update | https://www.mdpi.com/2077-1312/4/1/20 |
| article html file updated | 5 May 2019 22:44 CEST | Update | N/A |
| article html file updated | 26 March 2019 22:16 CET | Update | N/A |
| article html file updated | 27 October 2017 11:15 CEST | Original file | N/A |
| article pdf uploaded. | 2 March 2016 10:53 CET | Version of Record | https://www.mdpi.com/2077-1312/4/1/20/pdf |
| article xml uploaded. | 2 March 2016 10:53 CET | Original file | https://www.mdpi.com/2077-1312/4/1/20/xml |
