| article html file updated | 30 August 2025 10:14 CEST | Update | https://www.mdpi.com/1996-1073/12/1/21 |
| article html file updated | 17 July 2022 17:55 CEST | Update | N/A |
| article html file updated | 11 February 2020 04:42 CET | Update | N/A |
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| article html file updated | 22 December 2018 11:04 CET | Original file | N/A |
| article pdf uploaded. | 22 December 2018 11:03 CET | Updated version of record | https://www.mdpi.com/1996-1073/12/1/21/pdf |
| article xml uploaded. | 22 December 2018 11:03 CET | Update | https://www.mdpi.com/1996-1073/12/1/21/xml |
| article xml file uploaded | 22 December 2018 11:03 CET | Update | N/A |
| article pdf uploaded. | 21 December 2018 16:29 CET | Updated version of record | https://www.mdpi.com/1996-1073/12/1/21/pdf-vor |
| article pdf uploaded. | 21 December 2018 15:53 CET | Version of Record | https://www.mdpi.com/1996-1073/12/1/21/pdf-vor |
| article xml file uploaded | 21 December 2018 15:53 CET | Original file | N/A |
