| article html file updated | 9 February 2020 04:20 CET | Update | https://www.mdpi.com/1424-8247/11/1/9 |
| article html file updated | 30 September 2019 05:26 CEST | Update | - |
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| article xml uploaded. | 25 January 2018 17:54 CET | Original file | https://www.mdpi.com/1424-8247/11/1/9/xml |
| article pdf uploaded. | 25 January 2018 17:54 CET | Version of Record | https://www.mdpi.com/1424-8247/11/1/9/pdf |
