| article html file updated | 29 August 2025 23:12 CEST | Update | https://www.mdpi.com/2073-4360/8/6/221 |
| article html file updated | 16 July 2022 02:35 CEST | Update | - |
| article html file updated | 7 February 2020 09:50 CET | Update | - |
| article html file updated | 21 September 2019 18:35 CEST | Update | - |
| article html file updated | 5 May 2019 13:34 CEST | Update | - |
| article html file updated | 27 March 2019 06:53 CET | Update | - |
| article html file updated | 18 March 2019 04:55 CET | Update | - |
| article html file updated | 29 June 2016 11:34 CEST | Update | - |
| article html file updated | 7 June 2016 12:19 CEST | Original file | - |
| article xml uploaded. | 7 June 2016 12:17 CEST | Original file | https://www.mdpi.com/2073-4360/8/6/221/xml |
| article pdf uploaded. | 7 June 2016 12:17 CEST | Version of Record | https://www.mdpi.com/2073-4360/8/6/221/pdf |
