| article html file updated | 30 August 2025 11:49 CEST | Update | https://www.mdpi.com/2227-9067/6/2/21 |
| article html file updated | 21 August 2025 20:29 CEST | Update | N/A |
| article html file updated | 11 February 2020 13:49 CET | Update | N/A |
| article html file updated | 14 October 2019 11:52 CEST | Update | N/A |
| article html file updated | 26 April 2019 21:06 CEST | Update | N/A |
| article html file updated | 12 April 2019 16:54 CEST | Update | N/A |
| article html file updated | 3 April 2019 15:16 CEST | Update | N/A |
| article html file updated | 28 February 2019 14:12 CET | Update | N/A |
| article html file updated | 4 February 2019 17:30 CET | Original file | N/A |
| article pdf uploaded. | 4 February 2019 17:29 CET | Updated version of record | https://www.mdpi.com/2227-9067/6/2/21/pdf |
| article xml uploaded. | 4 February 2019 17:29 CET | Update | https://www.mdpi.com/2227-9067/6/2/21/xml |
| article xml file uploaded | 4 February 2019 17:29 CET | Update | N/A |
| article pdf uploaded. | 4 February 2019 13:44 CET | Version of Record | N/A |
| article xml file uploaded | 4 February 2019 13:44 CET | Original file | N/A |
