| article html file updated | 29 August 2025 23:08 CEST | Update | https://www.mdpi.com/1999-4923/8/2/18 |
| article html file updated | 16 July 2022 02:28 CEST | Update | - |
| article html file updated | 7 February 2020 09:11 CET | Update | - |
| article html file updated | 5 May 2019 14:52 CEST | Update | - |
| article html file updated | 27 March 2019 05:35 CET | Update | - |
| article html file updated | 5 July 2016 04:52 CEST | Update | - |
| article html file updated | 26 May 2016 05:50 CEST | Original file | - |
| article xml uploaded. | 24 May 2016 09:48 CEST | Original file | https://www.mdpi.com/1999-4923/8/2/18/xml |
| article pdf uploaded. | 24 May 2016 09:48 CEST | Version of Record | https://www.mdpi.com/1999-4923/8/2/18/pdf |