| article html file updated | 30 August 2025 01:46 CEST | Update | https://www.mdpi.com/2227-7390/5/4/68 |
| article html file updated | 16 July 2022 07:32 CEST | Update | - |
| article html file updated | 8 February 2020 21:56 CET | Update | - |
| article html file updated | 28 September 2019 16:17 CEST | Update | - |
| article html file updated | 2 May 2019 13:20 CEST | Update | - |
| article html file updated | 18 April 2019 10:59 CEST | Update | - |
| article html file updated | 2 January 2018 11:35 CET | Update | - |
| article html file updated | 22 November 2017 14:31 CET | Original file | - |
| article xml uploaded. | 22 November 2017 14:29 CET | Update | https://www.mdpi.com/2227-7390/5/4/68/xml |
| article xml uploaded. | 22 November 2017 14:29 CET | Original file | - |
| article pdf uploaded. | 22 November 2017 14:29 CET | Version of Record | https://www.mdpi.com/2227-7390/5/4/68/pdf |