| article html file updated | 30 August 2025 13:33 CEST | Update | https://www.mdpi.com/2227-7102/9/2/70 |
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| article pdf uploaded. | 31 March 2019 12:08 CEST | Version of Record | https://www.mdpi.com/2227-7102/9/2/70/pdf |
| article xml uploaded. | 31 March 2019 12:08 CEST | Update | https://www.mdpi.com/2227-7102/9/2/70/xml |
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