| article html file updated | 30 August 2025 01:42 CEST | Update | https://www.mdpi.com/2218-1989/7/4/60 |
| article html file updated | 16 July 2022 07:24 CEST | Update | - |
| article html file updated | 8 February 2020 21:19 CET | Update | - |
| article html file updated | 28 September 2019 12:20 CEST | Update | - |
| article html file updated | 2 May 2019 14:44 CEST | Update | - |
| article html file updated | 18 April 2019 12:23 CEST | Update | - |
| article html file updated | 2 January 2018 20:25 CET | Update | - |
| article html file updated | 20 November 2017 07:17 CET | Update | - |
| article xml uploaded. | 20 November 2017 07:16 CET | Update | https://www.mdpi.com/2218-1989/7/4/60/xml |
| article pdf uploaded. | 20 November 2017 07:16 CET | Updated version of record | https://www.mdpi.com/2218-1989/7/4/60/pdf |
| article html file updated | 17 November 2017 05:13 CET | Update | - |
| article xml uploaded. | 17 November 2017 05:11 CET | Update | - |
| article pdf uploaded. | 17 November 2017 05:11 CET | Updated version of record | https://www.mdpi.com/2218-1989/7/4/60/pdf-vor |
| article html file updated | 16 November 2017 08:29 CET | Original file | - |
| article xml uploaded. | 16 November 2017 08:27 CET | Original file | - |
| article pdf uploaded. | 16 November 2017 08:27 CET | Version of Record | https://www.mdpi.com/2218-1989/7/4/60/pdf-vor |