| article html file updated | 24 December 2025 14:09 CET | Update | https://www.mdpi.com/2226-4787/6/1/21 |
| article html file updated | 30 August 2025 02:47 CEST | Update | - |
| article html file updated | 21 August 2025 19:35 CEST | Update | - |
| article html file updated | 16 July 2022 09:33 CEST | Update | - |
| article html file updated | 9 February 2020 08:00 CET | Update | - |
| article html file updated | 1 October 2019 03:12 CEST | Update | - |
| article html file updated | 1 May 2019 15:32 CEST | Update | - |
| article html file updated | 17 April 2019 15:03 CEST | Update | - |
| article html file updated | 29 March 2019 02:27 CET | Update | - |
| article html file updated | 27 March 2018 15:02 CEST | Update | - |
| article pdf uploaded. | 28 February 2018 08:45 CET | Updated version of record | https://www.mdpi.com/2226-4787/6/1/21/pdf |
| article html file updated | 28 February 2018 08:43 CET | Original file | - |
| article xml uploaded. | 28 February 2018 08:42 CET | Original file | https://www.mdpi.com/2226-4787/6/1/21/xml |
| article pdf uploaded. | 28 February 2018 08:42 CET | Version of Record | https://www.mdpi.com/2226-4787/6/1/21/pdf-vor |
