| article html file updated | 9 February 2020 07:14 CET | Update | https://www.mdpi.com/1424-8220/18/2/646 |
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| article xml uploaded. | 22 February 2018 10:29 CET | Original file | https://www.mdpi.com/1424-8220/18/2/646/xml |
| article pdf uploaded. | 22 February 2018 10:28 CET | Version of Record | https://www.mdpi.com/1424-8220/18/2/646/pdf |