| article html file updated | 8 February 2020 02:08 CET | Update | https://www.mdpi.com/1424-8220/17/4/663 |
| article html file updated | 23 September 2019 23:41 CEST | Update | - |
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| article xml uploaded. | 24 March 2017 10:03 CET | Update | https://www.mdpi.com/1424-8220/17/4/663/xml |
| article pdf uploaded. | 24 March 2017 10:03 CET | Updated version of record | https://www.mdpi.com/1424-8220/17/4/663/pdf |
| article html file updated | 23 March 2017 13:18 CET | Original file | - |
| article pdf uploaded. | 23 March 2017 13:17 CET | Version of Record | https://www.mdpi.com/1424-8220/17/4/663/pdf-vor |
