| article html file updated | 8 February 2020 20:41 CET | Update | https://www.mdpi.com/2308-3417/2/4/33 |
| article html file updated | 28 September 2019 08:11 CEST | Update | - |
| article html file updated | 2 May 2019 16:08 CEST | Update | - |
| article html file updated | 8 November 2017 15:37 CET | Original file | - |
| article xml uploaded. | 8 November 2017 15:35 CET | Original file | https://www.mdpi.com/2308-3417/2/4/33/xml |
| article pdf uploaded. | 8 November 2017 15:35 CET | Version of Record | https://www.mdpi.com/2308-3417/2/4/33/pdf |
