| article html file updated | 7 February 2020 07:22 CET | Update | https://www.mdpi.com/1996-1073/9/4/293 |
| article html file updated | 5 May 2019 18:25 CEST | Update | - |
| article html file updated | 27 March 2019 02:05 CET | Update | - |
| article html file updated | 28 April 2016 08:00 CEST | Update | - |
| article html file updated | 16 April 2016 08:24 CEST | Original file | - |
| article xml uploaded. | 16 April 2016 08:22 CEST | Update | https://www.mdpi.com/1996-1073/9/4/293/xml |
| article pdf uploaded. | 16 April 2016 08:22 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/293/pdf |
