| article html file updated | 30 August 2025 09:27 CEST | Update | https://www.mdpi.com/2218-1997/4/12/138 |
| article html file updated | 17 July 2022 12:29 CEST | Update | N/A |
| article html file updated | 11 February 2020 00:31 CET | Update | N/A |
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| article html file updated | 25 December 2018 04:18 CET | Update | N/A |
| article html file updated | 19 December 2018 11:31 CET | Original file | N/A |
| article pdf uploaded. | 19 December 2018 11:30 CET | Updated version of record | https://www.mdpi.com/2218-1997/4/12/138/pdf |
| article xml uploaded. | 19 December 2018 11:30 CET | Update | https://www.mdpi.com/2218-1997/4/12/138/xml |
| article xml file uploaded | 19 December 2018 11:30 CET | Update | N/A |
| article pdf uploaded. | 1 December 2018 11:07 CET | Version of Record | https://www.mdpi.com/2218-1997/4/12/138/pdf-vor |
| article xml file uploaded | 1 December 2018 11:07 CET | Original file | N/A |
