| article html file updated | 7 February 2020 21:13 CET | Update | https://www.mdpi.com/2308-3417/2/1/3 |
| article html file updated | 4 May 2019 15:52 CEST | Update | N/A |
| article html file updated | 11 January 2017 13:18 CET | Update | N/A |
| article html file updated | 11 January 2017 13:18 CET | Update | N/A |
| article html file updated | 11 January 2017 13:18 CET | Original file | N/A |
| article xml uploaded. | 11 January 2017 13:17 CET | Original file | https://www.mdpi.com/2308-3417/2/1/3/xml |
| article pdf uploaded. | 11 January 2017 13:17 CET | Version of Record | https://www.mdpi.com/2308-3417/2/1/3/pdf |
