| article html file updated | 9 February 2020 02:36 CET | Update | https://www.mdpi.com/2411-5142/3/1/6 |
| article html file updated | 2 May 2019 03:10 CEST | Update | N/A |
| article html file updated | 18 April 2019 01:20 CEST | Update | N/A |
| article html file updated | 28 March 2019 14:31 CET | Update | N/A |
| article html file updated | 10 January 2018 14:36 CET | Original file | N/A |
| article xml uploaded. | 10 January 2018 14:34 CET | Original file | https://www.mdpi.com/2411-5142/3/1/6/xml |
| article pdf uploaded. | 10 January 2018 14:34 CET | Version of Record | https://www.mdpi.com/2411-5142/3/1/6/pdf |
