| article html file updated | 7 February 2020 06:37 CET | Update | https://www.mdpi.com/1996-1073/9/4/250 |
| article html file updated | 5 May 2019 20:00 CEST | Update | - |
| article html file updated | 27 March 2019 00:40 CET | Update | - |
| article html file updated | 28 April 2016 07:51 CEST | Update | - |
| article html file updated | 30 March 2016 10:33 CEST | Original file | - |
| article xml uploaded. | 30 March 2016 10:32 CEST | Update | https://www.mdpi.com/1996-1073/9/4/250/xml |
| article pdf uploaded. | 30 March 2016 10:32 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/250/pdf |
