| article html file updated | 30 August 2025 11:05 CEST | Update | https://www.mdpi.com/2223-7747/8/1/21 |
| article html file updated | 20 July 2022 16:03 CEST | Update | - |
| article html file updated | 11 February 2020 09:19 CET | Update | - |
| article html file updated | 13 October 2019 11:01 CEST | Update | - |
| article html file updated | 27 April 2019 05:48 CEST | Update | - |
| article html file updated | 13 April 2019 01:54 CEST | Update | - |
| article html file updated | 3 April 2019 04:24 CEST | Update | - |
| article html file updated | 30 January 2019 07:02 CET | Update | - |
| article html file updated | 16 January 2019 09:16 CET | Original file | - |
| article pdf uploaded. | 16 January 2019 09:15 CET | Version of Record | https://www.mdpi.com/2223-7747/8/1/21/pdf |
| article xml uploaded. | 16 January 2019 09:15 CET | Update | https://www.mdpi.com/2223-7747/8/1/21/xml |
| article xml file uploaded | 16 January 2019 09:15 CET | Original file | - |
