| article html file updated | 29 August 2025 23:15 CEST | Update | https://www.mdpi.com/1996-1073/9/6/474 |
| article html file updated | 16 July 2022 02:40 CEST | Update | N/A |
| article html file updated | 7 February 2020 10:27 CET | Update | N/A |
| article html file updated | 5 May 2019 12:25 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:58 CET | Update | N/A |
| article html file updated | 28 June 2016 09:37 CEST | Update | N/A |
| article html file updated | 20 June 2016 15:44 CEST | Original file | N/A |
| article xml uploaded. | 20 June 2016 15:42 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/474/xml |
| article pdf uploaded. | 20 June 2016 15:42 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/474/pdf |
