| article html file updated | 30 August 2025 01:51 CEST | Update | https://www.mdpi.com/2076-3921/6/4/99 |
| article html file updated | 21 August 2025 19:27 CEST | Update | N/A |
| article html file updated | 16 July 2022 07:43 CEST | Update | N/A |
| article html file updated | 8 February 2020 22:50 CET | Update | N/A |
| article html file updated | 28 September 2019 21:58 CEST | Update | N/A |
| article html file updated | 2 May 2019 11:18 CEST | Update | N/A |
| article html file updated | 18 April 2019 08:56 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:30 CET | Update | N/A |
| article html file updated | 1 December 2017 16:56 CET | Original file | N/A |
| article xml uploaded. | 1 December 2017 16:54 CET | Original file | https://www.mdpi.com/2076-3921/6/4/99/xml |
| article pdf uploaded. | 1 December 2017 16:54 CET | Version of Record | https://www.mdpi.com/2076-3921/6/4/99/pdf |
