| article html file updated | 29 August 2025 23:13 CEST | Update | https://www.mdpi.com/1996-1073/9/6/441 |
| article html file updated | 16 July 2022 02:36 CEST | Update | - |
| article html file updated | 7 February 2020 09:57 CET | Update | - |
| article html file updated | 5 May 2019 13:21 CEST | Update | - |
| article html file updated | 27 March 2019 07:06 CET | Update | - |
| article html file updated | 28 June 2016 09:31 CEST | Update | - |
| article html file updated | 9 June 2016 08:20 CEST | Original file | - |
| article xml uploaded. | 9 June 2016 08:18 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/441/xml |
| article pdf uploaded. | 9 June 2016 08:18 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/441/pdf |