| article html file updated | 7 February 2020 06:45 CET | Update | https://www.mdpi.com/1999-4893/9/2/23 |
| article html file updated | 5 May 2019 19:44 CEST | Update | - |
| article html file updated | 27 March 2019 00:54 CET | Update | - |
| article html file updated | 27 June 2016 12:11 CEST | Update | - |
| article html file updated | 1 April 2016 12:17 CEST | Original file | - |
| article xml uploaded. | 1 April 2016 12:16 CEST | Original file | https://www.mdpi.com/1999-4893/9/2/23/xml |
| article pdf uploaded. | 1 April 2016 12:16 CEST | Version of Record | https://www.mdpi.com/1999-4893/9/2/23/pdf |
