| article html file updated | 8 February 2020 07:28 CET | Update | https://www.mdpi.com/2071-1050/9/6/949 |
| article html file updated | 25 September 2019 04:15 CEST | Update | - |
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| article html file updated | 28 June 2017 14:39 CEST | Update | - |
| article html file updated | 5 June 2017 08:40 CEST | Original file | - |
| article xml uploaded. | 5 June 2017 08:39 CEST | Update | https://www.mdpi.com/2071-1050/9/6/949/xml |
| article pdf uploaded. | 5 June 2017 08:39 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/949/pdf |
