| article html file updated | 30 August 2025 01:33 CEST | Update | https://www.mdpi.com/2079-7737/6/4/37 |
| article html file updated | 16 July 2022 07:06 CEST | Update | - |
| article html file updated | 8 February 2020 19:49 CET | Update | - |
| article html file updated | 28 September 2019 02:32 CEST | Update | - |
| article html file updated | 2 May 2019 18:08 CEST | Update | - |
| article html file updated | 2 January 2018 20:32 CET | Update | - |
| article html file updated | 30 October 2017 12:05 CET | Original file | - |
| article xml uploaded. | 30 October 2017 12:04 CET | Original file | https://www.mdpi.com/2079-7737/6/4/37/xml |
| article pdf uploaded. | 30 October 2017 12:04 CET | Version of Record | https://www.mdpi.com/2079-7737/6/4/37/pdf |
