| article html file updated | 7 February 2020 06:44 CET | Update | https://www.mdpi.com/1996-1073/9/4/263 |
| article html file updated | 5 May 2019 19:46 CEST | Update | - |
| article html file updated | 27 March 2019 00:52 CET | Update | - |
| article html file updated | 28 April 2016 07:53 CEST | Update | - |
| article html file updated | 1 April 2016 12:28 CEST | Original file | - |
| article xml uploaded. | 1 April 2016 12:27 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/263/xml |
| article pdf uploaded. | 1 April 2016 12:27 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/263/pdf |
