| article html file updated | 28 September 2025 19:15 CEST | Update | https://www.mdpi.com/2077-1444/4/1/30 |
| article html file updated | 6 February 2020 00:09 CET | Update | - |
| article html file updated | 19 September 2019 17:19 CEST | Update | - |
| article html file updated | 8 May 2019 09:27 CEST | Update | - |
| article html file updated | 20 March 2019 17:37 CET | Original file | - |
| article pdf uploaded. | 23 January 2013 09:13 CET | Updated version of record | https://www.mdpi.com/2077-1444/4/1/30/pdf |
| article pdf uploaded. | 22 January 2013 13:26 CET | Version of Record | https://www.mdpi.com/2077-1444/4/1/30/pdf-vor |
