| article html file updated | 8 February 2020 21:22 CET | Update | https://www.mdpi.com/2304-6740/5/4/80 |
| article html file updated | 28 September 2019 12:37 CEST | Update | - |
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| article html file updated | 2 January 2018 13:55 CET | Update | - |
| article html file updated | 16 November 2017 11:20 CET | Original file | - |
| article xml uploaded. | 16 November 2017 11:19 CET | Original file | https://www.mdpi.com/2304-6740/5/4/80/xml |
| article pdf uploaded. | 16 November 2017 11:19 CET | Version of Record | https://www.mdpi.com/2304-6740/5/4/80/pdf |
