| article html file updated | 29 August 2025 22:31 CEST | Update | https://www.mdpi.com/2218-2004/4/1/2 |
| article html file updated | 16 July 2022 01:31 CEST | Update | N/A |
| article html file updated | 7 February 2020 02:45 CET | Update | N/A |
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| article html file updated | 26 March 2019 17:19 CET | Update | N/A |
| article html file updated | 29 March 2016 07:14 CEST | Original file | N/A |
| article pdf uploaded. | 12 January 2016 15:09 CET | Updated version of record | https://www.mdpi.com/2218-2004/4/1/2/pdf |
| article pdf uploaded. | 28 December 2015 03:43 CET | Updated version of record | https://www.mdpi.com/2218-2004/4/1/2/pdf-vor |
| article xml uploaded. | 28 December 2015 03:43 CET | Update | https://www.mdpi.com/2218-2004/4/1/2/xml |
| article xml uploaded. | 28 December 2015 03:43 CET | Update | N/A |
| article xml uploaded. | 28 December 2015 03:41 CET | Update | N/A |
| article pdf uploaded. | 28 December 2015 03:40 CET | Updated version of record | https://www.mdpi.com/2218-2004/4/1/2/pdf-vor |
| article xml uploaded. | 28 December 2015 03:40 CET | Update | N/A |
| article pdf uploaded. | 25 December 2015 11:18 CET | Version of Record | https://www.mdpi.com/2218-2004/4/1/2/pdf-vor |
| article xml uploaded. | 25 December 2015 11:18 CET | Original file | N/A |
