| article html file updated | 7 February 2020 07:23 CET | Update | https://www.mdpi.com/1996-1073/9/4/290 |
| article html file updated | 5 May 2019 18:23 CEST | Update | - |
| article html file updated | 27 March 2019 02:07 CET | Update | - |
| article html file updated | 28 April 2016 07:59 CEST | Update | - |
| article html file updated | 16 April 2016 10:10 CEST | Original file | - |
| article xml uploaded. | 16 April 2016 10:09 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/290/xml |
| article pdf uploaded. | 16 April 2016 10:09 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/290/pdf |
