| article html file updated | 7 February 2020 07:36 CET | Update | https://www.mdpi.com/1996-1073/9/4/304 |
| article html file updated | 5 May 2019 17:58 CEST | Update | N/A |
| article html file updated | 27 March 2019 02:34 CET | Update | N/A |
| article html file updated | 28 April 2016 08:07 CEST | Update | N/A |
| article html file updated | 21 April 2016 11:19 CEST | Original file | N/A |
| article xml uploaded. | 21 April 2016 11:17 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/304/xml |
| article pdf uploaded. | 21 April 2016 11:17 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/304/pdf |
