| article html file updated | 7 February 2020 21:12 CET | Update | https://www.mdpi.com/2411-5142/2/1/3 |
| article html file updated | 4 May 2019 15:54 CEST | Update | N/A |
| article html file updated | 12 January 2017 02:24 CET | Original file | N/A |
| article xml uploaded. | 12 January 2017 02:22 CET | Original file | https://www.mdpi.com/2411-5142/2/1/3/xml |
| article pdf uploaded. | 12 January 2017 02:22 CET | Version of Record | https://www.mdpi.com/2411-5142/2/1/3/pdf |
