| article html file updated | 7 February 2020 06:50 CET | Update | https://www.mdpi.com/1996-1073/9/4/269 |
| article html file updated | 5 May 2019 19:34 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:03 CET | Update | N/A |
| article html file updated | 28 April 2016 07:54 CEST | Update | N/A |
| article html file updated | 5 April 2016 13:19 CEST | Original file | N/A |
| article xml uploaded. | 5 April 2016 13:18 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/269/xml |
| article pdf uploaded. | 5 April 2016 13:18 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/269/pdf |
