| article html file updated | 30 August 2025 09:50 CEST | Update | https://www.mdpi.com/2227-7099/6/4/67 |
| article html file updated | 17 July 2022 14:58 CEST | Update | N/A |
| article html file updated | 11 February 2020 02:37 CET | Update | N/A |
| article html file updated | 11 October 2019 19:41 CEST | Update | N/A |
| article html file updated | 27 April 2019 20:42 CEST | Update | N/A |
| article html file updated | 13 April 2019 16:34 CEST | Update | N/A |
| article html file updated | 2 April 2019 11:40 CEST | Update | N/A |
| article html file updated | 26 December 2018 05:52 CET | Update | N/A |
| article html file updated | 18 December 2018 12:28 CET | Original file | N/A |
| article pdf uploaded. | 18 December 2018 12:26 CET | Updated version of record | https://www.mdpi.com/2227-7099/6/4/67/pdf |
| article xml uploaded. | 18 December 2018 12:26 CET | Update | https://www.mdpi.com/2227-7099/6/4/67/xml |
| article xml file uploaded | 18 December 2018 12:26 CET | Update | N/A |
| article pdf uploaded. | 11 December 2018 16:09 CET | Updated version of record | https://www.mdpi.com/2227-7099/6/4/67/pdf-vor |
| article pdf uploaded. | 11 December 2018 16:08 CET | Version of Record | https://www.mdpi.com/2227-7099/6/4/67/pdf-vor |
| article xml file uploaded | 11 December 2018 16:08 CET | Original file | N/A |
