| article html file updated | 12 August 2026 21:57 CEST | Update | https://www.mdpi.com/2218-273X/4/1/117 |
| article html file updated | 29 August 2025 20:55 CEST | Update | N/A |
| article html file updated | 15 July 2022 22:49 CEST | Update | N/A |
| article html file updated | 6 February 2020 06:46 CET | Update | N/A |
| article html file updated | 7 May 2019 19:43 CEST | Update | N/A |
| article html file updated | 21 March 2019 11:07 CET | Update | N/A |
| article html file updated | 14 March 2018 13:20 CET | Update | N/A |
| article html file updated | 19 August 2015 17:39 CEST | Update | N/A |
| article html file updated | 28 April 2014 10:37 CEST | Original file | N/A |
| article xml file uploaded | 28 April 2014 10:37 CEST | Original file | https://www.mdpi.com/2218-273X/4/1/117/xml |
| article pdf uploaded. | 16 January 2014 14:18 CET | Version of Record | https://www.mdpi.com/2218-273X/4/1/117/pdf |
