| article html file updated | 31 August 2025 07:19 CEST | Update | https://www.mdpi.com/1996-1073/13/1/91 |
| article html file updated | 19 July 2022 20:58 CEST | Update | - |
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| article html file updated | 25 December 2019 13:44 CET | Original file | - |
| article pdf uploaded. | 25 December 2019 13:42 CET | Updated version of record | https://www.mdpi.com/1996-1073/13/1/91/pdf |
| article xml uploaded. | 25 December 2019 13:42 CET | Update | https://www.mdpi.com/1996-1073/13/1/91/xml |
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| article pdf uploaded. | 23 December 2019 16:08 CET | Version of Record | https://www.mdpi.com/1996-1073/13/1/91/pdf-vor |
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