| article html file updated | 7 February 2020 10:04 CET | Update | https://www.mdpi.com/1999-4893/9/2/40 |
| article html file updated | 5 May 2019 13:09 CEST | Update | - |
| article html file updated | 27 March 2019 07:18 CET | Update | - |
| article html file updated | 27 June 2016 12:19 CEST | Update | - |
| article html file updated | 14 June 2016 22:39 CEST | Original file | - |
| article xml uploaded. | 13 June 2016 08:39 CEST | Original file | https://www.mdpi.com/1999-4893/9/2/40/xml |
| article pdf uploaded. | 13 June 2016 08:39 CEST | Version of Record | https://www.mdpi.com/1999-4893/9/2/40/pdf |
