| article html file updated | 7 February 2020 09:55 CET | Update | https://www.mdpi.com/1999-4893/9/2/38 |
| article html file updated | 5 May 2019 13:24 CEST | Update | - |
| article html file updated | 27 March 2019 07:02 CET | Update | - |
| article html file updated | 27 June 2016 12:18 CEST | Update | - |
| article html file updated | 8 June 2016 10:54 CEST | Original file | - |
| article xml uploaded. | 8 June 2016 10:52 CEST | Original file | https://www.mdpi.com/1999-4893/9/2/38/xml |
| article pdf uploaded. | 8 June 2016 10:52 CEST | Version of Record | https://www.mdpi.com/1999-4893/9/2/38/pdf |
