| article html file updated | 30 August 2025 20:47 CEST | Update | https://www.mdpi.com/2227-9709/6/2/23 |
| article html file updated | 19 July 2022 19:43 CEST | Update | N/A |
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| article html file updated | 26 June 2019 04:34 CEST | Original file | N/A |
| article pdf uploaded. | 26 June 2019 04:33 CEST | Updated version of record | https://www.mdpi.com/2227-9709/6/2/23/pdf |
| article xml uploaded. | 26 June 2019 04:33 CEST | Update | https://www.mdpi.com/2227-9709/6/2/23/xml |
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| article pdf uploaded. | 5 June 2019 16:19 CEST | Version of Record | https://www.mdpi.com/2227-9709/6/2/23/pdf-vor |
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