| article html file updated | 29 August 2025 22:39 CEST | Update | https://www.mdpi.com/2076-3417/6/2/39 |
| article html file updated | 16 July 2022 01:42 CEST | Update | - |
| article html file updated | 7 February 2020 04:07 CET | Update | - |
| article html file updated | 6 May 2019 01:17 CEST | Update | - |
| article html file updated | 26 March 2019 19:48 CET | Original file | - |
| article pdf uploaded. | 1 February 2016 08:47 CET | Version of Record | https://www.mdpi.com/2076-3417/6/2/39/pdf |
| article xml uploaded. | 1 February 2016 08:47 CET | Original file | https://www.mdpi.com/2076-3417/6/2/39/xml |
