| article html file updated | 7 February 2020 06:32 CET | Update | https://www.mdpi.com/1996-1073/9/4/247 |
| article html file updated | 5 May 2019 20:09 CEST | Update | - |
| article html file updated | 27 March 2019 00:33 CET | Update | - |
| article html file updated | 28 April 2016 07:50 CEST | Update | - |
| article html file updated | 29 March 2016 09:50 CEST | Original file | - |
| article xml uploaded. | 29 March 2016 09:49 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/247/xml |
| article pdf uploaded. | 29 March 2016 09:49 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/247/pdf |
