| article html file updated | 9 February 2020 00:04 CET | Update | https://www.mdpi.com/2073-4441/9/12/974 |
| article html file updated | 29 September 2019 05:07 CEST | Update | - |
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| article html file updated | 2 January 2018 16:53 CET | Update | - |
| article html file updated | 14 December 2017 09:37 CET | Original file | - |
| article xml uploaded. | 14 December 2017 09:35 CET | Original file | https://www.mdpi.com/2073-4441/9/12/974/xml |
| article pdf uploaded. | 14 December 2017 09:35 CET | Version of Record | https://www.mdpi.com/2073-4441/9/12/974/pdf |
