| article html file updated | 7 February 2020 07:05 CET | Update | https://www.mdpi.com/1996-1073/9/4/275 |
| article html file updated | 5 May 2019 19:01 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:31 CET | Update | N/A |
| article html file updated | 28 April 2016 07:55 CEST | Update | N/A |
| article html file updated | 11 April 2016 07:51 CEST | Original file | N/A |
| article xml uploaded. | 11 April 2016 07:49 CEST | Update | https://www.mdpi.com/1996-1073/9/4/275/xml |
| article pdf uploaded. | 11 April 2016 07:49 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/275/pdf |
