| article html file updated | 8 February 2020 02:16 CET | Update | https://www.mdpi.com/1424-8220/17/4/681 |
| article html file updated | 24 September 2019 00:20 CEST | Update | - |
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| article html file updated | 29 April 2017 13:30 CEST | Update | - |
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| article html file updated | 25 March 2017 22:37 CET | Update | - |
| article html file updated | 25 March 2017 11:05 CET | Original file | - |
| article xml uploaded. | 25 March 2017 11:04 CET | Original file | https://www.mdpi.com/1424-8220/17/4/681/xml |
| article pdf uploaded. | 25 March 2017 11:04 CET | Version of Record | https://www.mdpi.com/1424-8220/17/4/681/pdf |
