| article html file updated | 7 February 2020 06:22 CET | Update | https://www.mdpi.com/1424-8220/16/4/425 |
| article html file updated | 5 May 2019 20:30 CEST | Update | - |
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| article html file updated | 29 April 2016 04:09 CEST | Update | - |
| article html file updated | 25 March 2016 06:48 CET | Original file | - |
| article xml uploaded. | 25 March 2016 06:47 CET | Original file | https://www.mdpi.com/1424-8220/16/4/425/xml |
| article pdf uploaded. | 25 March 2016 06:47 CET | Version of Record | https://www.mdpi.com/1424-8220/16/4/425/pdf |
