| article html file updated | 7 February 2020 06:35 CET | Update | https://www.mdpi.com/1996-1073/9/4/249 |
| article html file updated | 5 May 2019 20:03 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:38 CET | Update | N/A |
| article html file updated | 28 April 2016 07:51 CEST | Update | N/A |
| article html file updated | 30 March 2016 08:50 CEST | Original file | N/A |
| article xml uploaded. | 30 March 2016 08:48 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/249/xml |
| article pdf uploaded. | 30 March 2016 08:48 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/249/pdf |
