| article html file updated | 9 February 2020 03:23 CET | Update | https://www.mdpi.com/2411-5134/3/1/6 |
| article html file updated | 2 May 2019 01:35 CEST | Update | N/A |
| article html file updated | 17 April 2019 23:53 CEST | Update | N/A |
| article html file updated | 28 March 2019 16:19 CET | Update | N/A |
| article html file updated | 17 January 2018 17:00 CET | Original file | N/A |
| article xml uploaded. | 17 January 2018 16:58 CET | Original file | https://www.mdpi.com/2411-5134/3/1/6/xml |
| article pdf uploaded. | 17 January 2018 16:58 CET | Version of Record | https://www.mdpi.com/2411-5134/3/1/6/pdf |
