| article html file updated | 30 August 2025 02:25 CEST | Update | https://www.mdpi.com/2076-0760/7/2/21 |
| article html file updated | 16 July 2022 08:53 CEST | Update | N/A |
| article html file updated | 9 February 2020 04:48 CET | Update | N/A |
| article html file updated | 30 September 2019 08:11 CEST | Update | N/A |
| article html file updated | 1 May 2019 22:37 CEST | Update | N/A |
| article html file updated | 17 April 2019 21:17 CEST | Update | N/A |
| article html file updated | 28 March 2019 19:20 CET | Update | N/A |
| article html file updated | 29 January 2018 18:24 CET | Original file | N/A |
| article xml uploaded. | 29 January 2018 18:23 CET | Original file | https://www.mdpi.com/2076-0760/7/2/21/xml |
| article pdf uploaded. | 29 January 2018 18:23 CET | Version of Record | https://www.mdpi.com/2076-0760/7/2/21/pdf |
