| article html file updated | 7 February 2020 03:07 CET | Update | https://www.mdpi.com/2311-7524/2/1/1 |
| article html file updated | 6 May 2019 03:10 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:51 CET | Original file | N/A |
| article pdf uploaded. | 6 January 2016 15:28 CET | Version of Record | https://www.mdpi.com/2311-7524/2/1/1/pdf |
| article xml uploaded. | 6 January 2016 15:28 CET | Original file | https://www.mdpi.com/2311-7524/2/1/1/xml |
