| article html file updated | 30 August 2025 03:07 CEST | Update | https://www.mdpi.com/2504-4494/2/2/21 |
| article html file updated | 21 August 2025 19:46 CEST | Update | N/A |
| article html file updated | 9 February 2020 10:41 CET | Update | N/A |
| article html file updated | 1 October 2019 20:09 CEST | Update | N/A |
| article html file updated | 1 May 2019 09:56 CEST | Update | N/A |
| article html file updated | 17 April 2019 09:49 CEST | Update | N/A |
| article html file updated | 29 March 2019 08:27 CET | Update | N/A |
| article html file updated | 21 March 2018 15:14 CET | Original file | N/A |
| article xml uploaded. | 21 March 2018 15:12 CET | Original file | https://www.mdpi.com/2504-4494/2/2/21/xml |
| article pdf uploaded. | 21 March 2018 15:12 CET | Version of Record | https://www.mdpi.com/2504-4494/2/2/21/pdf |