| article html file updated | 30 August 2025 11:37 CEST | Update | https://www.mdpi.com/2227-9067/6/2/17 |
| article html file updated | 18 July 2022 02:33 CEST | Update | - |
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| article pdf uploaded. | 21 February 2019 17:14 CET | Updated version of record | https://www.mdpi.com/2227-9067/6/2/17/pdf |
| article xml uploaded. | 21 February 2019 17:14 CET | Update | https://www.mdpi.com/2227-9067/6/2/17/xml |
| article html file updated | 30 January 2019 17:36 CET | Original file | - |
| article pdf uploaded. | 30 January 2019 17:35 CET | Updated version of record | https://www.mdpi.com/2227-9067/6/2/17/pdf-vor |
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| article pdf uploaded. | 29 January 2019 16:05 CET | Updated version of record | https://www.mdpi.com/2227-9067/6/2/17/pdf-vor |
| article pdf uploaded. | 29 January 2019 15:58 CET | Version of Record | https://www.mdpi.com/2227-9067/6/2/17/pdf-vor |
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