| article html file updated | 7 February 2020 06:49 CET | Update | https://www.mdpi.com/1996-1073/9/4/267 |
| article html file updated | 5 May 2019 19:35 CEST | Update | - |
| article html file updated | 27 March 2019 01:01 CET | Update | - |
| article html file updated | 28 April 2016 07:54 CEST | Update | - |
| article html file updated | 5 April 2016 08:36 CEST | Original file | - |
| article xml uploaded. | 5 April 2016 08:34 CEST | Update | https://www.mdpi.com/1996-1073/9/4/267/xml |
| article pdf uploaded. | 5 April 2016 08:34 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/267/pdf |
