| article html file updated | 7 February 2020 20:33 CET | Update | https://www.mdpi.com/1996-1073/10/1/31 |
| article html file updated | 22 September 2019 16:32 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:19 CEST | Update | N/A |
| article html file updated | 7 February 2017 09:35 CET | Update | N/A |
| article html file updated | 30 December 2016 11:11 CET | Original file | N/A |
| article xml uploaded. | 30 December 2016 11:10 CET | Original file | https://www.mdpi.com/1996-1073/10/1/31/xml |
| article pdf uploaded. | 30 December 2016 11:10 CET | Version of Record | https://www.mdpi.com/1996-1073/10/1/31/pdf |
