| article html file updated | 13 August 2026 00:12 CEST | Update | https://www.mdpi.com/1999-5903/6/2/261 |
| article html file updated | 29 August 2025 21:03 CEST | Update | N/A |
| article html file updated | 15 July 2022 23:02 CEST | Update | N/A |
| article html file updated | 6 February 2020 09:04 CET | Update | N/A |
| article html file updated | 7 May 2019 14:54 CEST | Update | N/A |
| article html file updated | 21 March 2019 16:38 CET | Update | N/A |
| article html file updated | 20 August 2015 05:57 CEST | Original file | N/A |
| article pdf uploaded. | 12 May 2014 10:47 CEST | Updated version of record | https://www.mdpi.com/1999-5903/6/2/261/pdf |
| article pdf uploaded. | 6 May 2014 15:55 CEST | Version of Record | https://www.mdpi.com/1999-5903/6/2/261/pdf-vor |
