| article html file updated | 30 August 2025 00:12 CEST | Update | https://www.mdpi.com/1999-4915/9/1/6 |
| article html file updated | 16 July 2022 04:27 CEST | Update | N/A |
| article html file updated | 7 February 2020 21:05 CET | Update | N/A |
| article html file updated | 22 September 2019 19:34 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:09 CEST | Update | N/A |
| article html file updated | 7 February 2017 12:21 CET | Update | N/A |
| article html file updated | 10 January 2017 11:34 CET | Original file | N/A |
| article xml uploaded. | 10 January 2017 11:33 CET | Original file | https://www.mdpi.com/1999-4915/9/1/6/xml |
| article pdf uploaded. | 10 January 2017 11:33 CET | Version of Record | https://www.mdpi.com/1999-4915/9/1/6/pdf |
