| article html file updated | 30 August 2025 00:16 CEST | Update | https://www.mdpi.com/1999-4915/9/1/21 |
| article html file updated | 16 July 2022 04:36 CEST | Update | N/A |
| article html file updated | 7 February 2020 21:56 CET | Update | N/A |
| article html file updated | 22 September 2019 23:58 CEST | Update | N/A |
| article html file updated | 4 May 2019 14:10 CEST | Update | N/A |
| article html file updated | 7 February 2017 12:26 CET | Update | N/A |
| article html file updated | 21 January 2017 09:07 CET | Original file | N/A |
| article xml uploaded. | 21 January 2017 09:06 CET | Original file | https://www.mdpi.com/1999-4915/9/1/21/xml |
| article pdf uploaded. | 21 January 2017 09:06 CET | Version of Record | https://www.mdpi.com/1999-4915/9/1/21/pdf |