| article html file updated | 9 February 2020 13:24 CET | Update | https://www.mdpi.com/1660-4601/15/4/721 |
| article html file updated | 2 October 2019 12:16 CEST | Update | - |
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| article html file updated | 11 April 2018 16:42 CEST | Original file | - |
| article xml uploaded. | 11 April 2018 16:40 CEST | Original file | https://www.mdpi.com/1660-4601/15/4/721/xml |
| article pdf uploaded. | 11 April 2018 16:40 CEST | Version of Record | https://www.mdpi.com/1660-4601/15/4/721/pdf |
