| article html file updated | 30 August 2025 02:01 CEST | Update | https://www.mdpi.com/2079-7737/6/4/47 |
| article html file updated | 21 August 2025 19:28 CEST | Update | N/A |
| article html file updated | 9 February 2020 00:40 CET | Update | N/A |
| article html file updated | 29 September 2019 08:39 CEST | Update | N/A |
| article html file updated | 2 May 2019 07:17 CEST | Update | N/A |
| article html file updated | 18 April 2019 05:09 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:32 CET | Update | N/A |
| article html file updated | 20 December 2017 11:44 CET | Original file | N/A |
| article xml uploaded. | 20 December 2017 11:43 CET | Original file | https://www.mdpi.com/2079-7737/6/4/47/xml |
| article pdf uploaded. | 20 December 2017 11:43 CET | Version of Record | https://www.mdpi.com/2079-7737/6/4/47/pdf |
