| article html file updated | 7 February 2020 07:23 CET | Update | https://www.mdpi.com/1424-8220/16/4/551 |
| article html file updated | 5 May 2019 18:24 CEST | Update | - |
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| article html file updated | 29 April 2016 05:09 CEST | Update | - |
| article html file updated | 16 April 2016 09:21 CEST | Original file | - |
| article xml uploaded. | 16 April 2016 09:20 CEST | Original file | https://www.mdpi.com/1424-8220/16/4/551/xml |
| article pdf uploaded. | 16 April 2016 09:20 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/4/551/pdf |
