| article html file updated | 12 August 2026 21:45 CEST | Update | https://www.mdpi.com/2075-1702/2/1/13 |
| article html file updated | 29 August 2025 20:54 CEST | Update | N/A |
| article html file updated | 15 July 2022 22:47 CEST | Update | N/A |
| article html file updated | 6 February 2020 06:32 CET | Update | N/A |
| article html file updated | 7 May 2019 20:13 CEST | Update | N/A |
| article html file updated | 21 March 2019 10:26 CET | Original file | N/A |
| article pdf uploaded. | 3 January 2014 12:10 CET | Updated version of record | https://www.mdpi.com/2075-1702/2/1/13/pdf |
| article pdf uploaded. | 2 January 2014 14:36 CET | Version of Record | https://www.mdpi.com/2075-1702/2/1/13/pdf-vor |
